Motus Wildlife Tracking System Background: What is Motus?

Part I in a five-part series

Motus is a relatively recent program in Belize. But what is Motus? What is it used for? Who uses Motus, and how is it beneficial? These are possibly just a few questions which may come to anyone’s mind upon hearing the word for the first time. There is a lot to learn about Motus – how highly beneficial it is to the scientific community, to private landowners and managers, to stewards and caretakers of protected areas, to forest and nature reserve managers, to educators and students, and even to the local populace. It is a tool which provides meaningful data on current and future migratory ecological wildlife studies.  Such data can be utilized by decision makers, especially in government circles, to help prioritize areas for wildlife protection. In general, Motus (the Latin word for movement), is an international collaborative network of researchers that use automated radio telemetry to simultaneously track and study the migratory movements of birds, bats, and large insects at local, regional, and hemispheric scales. Therefore, this article aims to look at Motus in a bit more detail.

Motus was developed by Bird Studies Canada in 2014. Funding and support was provided by Canadian Foundation for Innovation grant, in partnership with Acadia University, (Nova Scotia), Western University (Ontario), the University of Guelph (Ontario), and other collaborating researchers and organizations. 

In March 2023, BFREE became a part of this international network by installing two antennas to the 145′ radio tower at BFREE adjacent to the dining room (Lat. 16.5551o Lon. 88.7065o). Prior to the BFREE installation, only one Motus Tower existed in Belize and this tower was installed at Toucan Ridge Ecology and Education Society (TREES) on May 2022 in Central Belize (Lat. 17.0526o Lon. 88.5654o). Following the BFREE installation, another Motus Tower was installed at the Lamanai Field Research Station in Northern Belize (Lat. 17.7521o Lon. 88.6538o). The other two closest Motus Towers to Belize are in neighboring Guatemala. The yellow dots indicate where Motus towers have been installed and activated in Belize and Guatemala.  (Figs. 1 & 2).

Motus continues to expand globally. For example, in the USA along the Pacific Coast flyways, Motus towers are being installed along the coasts of Oregon and Washington. The towers in these areas are collecting data on shore-bird movements such as Western Sandpiper, Sanderling, Semipalmated Plover, and Dunlin. Interestingly, all four species except for the Dunlin, are regular winter visitors along Belize’s shoreline and Cayes, while the Dunlin is considered a “transient” species but also uses the coastline and Cayes as stopover sites while migrating to countries further south. Such data continues to provide valuable information on migratory pathways, stopover sites, breeding, and wintering habitats of these birds. Researchers, scientists, and biologists working in this region are also working with partners in Mexico on Birds of Conservation Concern such as the Pacific Red Knot, one of the longest distance flyers of any shorebird. Interestingly, Belize has very few records of this species along the northern coastline.

Western Sandpiper is a shore-bird sometimes spotted in the Bladen River and is one that Motus technology is tracking. Image courtesy of Cornell Lab Photo Library of Birds

Data collected from the Motus Towers detects the different estuaries where the Pacific Red Knot migrates, how they’re using estuaries, and how long they stay there. In 2022, several Motus stations were installed in Puerto Rico in partnership with Birds Caribbean. The Caribbean Motus Collaboration (CMC) was formed to expand the Motus network in the Caribbean as part of the Landbird Monitoring Project. Recently, through the Neotropical Migratory Bird Conservation Act (NMBCA) grant program, the international collaboration expanded and funded additional Motus station installations and research across the Americas, including the first Motus bird monitoring network in Mexico.

During its first three years, Motus expanded to include more than 120 independent research projects, and comprised over 325 active receiver stations across 11 countries and 3 continents. This rich and comprehensive data set included detections of individuals during all phases of the annual cycle (breeding, migration, and non-breeding).

According to a recent article written by Rosalie Wetzel and published in May 2023, Motus has grown to include more than 1,200 stations across 31 countries. Again, the yellow dots indicate Motus stations throughout the world. Motus is indeed the largest international collaborative research network that brings together organizations and individuals to facilitate research and education on the ecology and conservation of flying migratory species.

Most of the information and graphics used in this article were obtained from the following sources:

  • Birds Canada. 2019. Motus Wildlife Tracking System. Port Rowan, Ontario. Available: http://www.motus.org. Accessed: October 2, 2023.
  • Taylor, et.al. 2017. The Motus Wildlife Tracking System: a collaborative research network to enhance the understanding of wildlife movement. Accessed: October 4, 2023.
  • Rosalie Wetzel. May 31, 2023. U.S. Fish and Wildlife Service. Motus Stations: Tracking Migrations from Coast to Coast. Accessed: October 5, 2023.
  • Michael Rogers summary of BFREE Motus Tower. October 2023.

Stay tuned for Series Article Part II: How does Motus work?

BFREE Wildlife & Conservation Status Directory

BFREE Program Manager, Tyler Sanville, used data created by visiting and resident biologists to develop a complete list of the known organisms with the exception of snails, insects, and butterflies documented to date in the BFREE Reserve, along with their IUCN Status and Population Trend.

Known species found on the BFREE Privately Protected Area include six endangered (EN), seven vulnerable (VU), and twenty-one nearly threatened (NT) species of wildlife.BFREE’s Wildlife & Conservation Status Directory includes 95 mammal species, 324 bird species, 71 reptile species, 27 amphibian species, and 27 fish species. This list is based on the most up-to-date information available and is by no means complete. You can view the entire list of the nearly 550 species found at BFREE below. 

Documentarians visit BFREE

Professional photographers, videographers, and documentarians Jorge Silva Rivera and Carlos Miguel Herrera traveled from Chiapas, Mexico, to BFREE for 10-days in February 2022. Working with Zamia Media, the pair set out to document the people, facilities, wildlife, and natural beauty of BFREE. Zamia Media will then use the images and videos captured during their time to create updated visuals for BFREE to use on our website and in other marketing materials.

The duo has vast experience documenting remote, hard-to-reach places throughout southern Mexico and has worked to discover and learn more about some of the most ancient and biodiverse locations in the world.

During their time at BFREE, they spent several days interviewing all of the staff and many of the volunteers and other visitors who overlapped with their visit. They used multiple drones to capture BFREE’s privately protected area and spent hours photographing the flora and fauna throughout the property. It was an honor to host Jorge and Carlos at BFREE and such an incredible experience to have them alongside our team for nearly two weeks.

We understand the importance of documenting our work and sharing the incredible place that is BFREE. However, it can be difficult to do so when all of the other work is so demanding. We are so grateful to have had these two professionals join us so that we can continue #BringingBFREEToYou!

Congratulations Drs. James Rotenberg and Vibeke Olson on your retirement!

Vibeke Olson and Jamie Rotenberg

Congratulations to long-time BFREE supporters, field course leaders, researchers, and adventurers, Drs. Jamie Rotenberg and Vibeke Olson on their recent retirement from the University of North Carolina Wilmington. Extraordinary husband and wife team, Jamie and Vibeke, have been visiting BFREE for nearly two decades as professors bringing field courses, as researchers, with their graduate students, and as supporters. 

Their impact on BFREE has been significant. BFREE is a better place because of Jamie and Vibeke. So from your BFREE family, congratulations! We look forward to this next chapter in your lives and can’t wait to share in a few of your upcoming adventures.


Messages from your BFREE Friends and Family:

Judy Dourson and Jamie on a UNCW-BFREE Field Course in 2007. Photo Credit: Lisa Ramsden

From Judy and Dan Dourson, BFREE Staff Members 2006 – 2013:

We first met Jamie (Dr. Rotenberg to most) in December of 2006 in our first few months as field station managers of BFREE.  He arrived along with close friend and cave diver, Sam Meachum, to lead the first of many expeditions into the Bladen Nature Reserve to establish survey protocols for what would be an extensive, long-term study of neotropical migratory birds and the signature species, the Harpy Eagle.  Jamie’s tenacity and determination were on full display when he limped into BFREE after one particularly grueling expedition, hiking over 8 hours through trail-less, brutal terrain to reach BFREE only to discover a very painful broken collarbone.  Dr. Rotenberg’s tireless commitment to the Avian Monitoring and Harpy Eagle study produced numerous grants to fund the study.

By far our most elaborate scientific collaboration with Jamie was in 2016 when Dan became a co-investigator for a National Geographic Waitt Foundation Grant that focused on the potential relationship between land snails (Dan’s research focus) and Harpy Eagles.  With over 30 participants, the expedition was a technological feat that entailed creating a mobile lab to process snails, portable generators hauled deep into the jungle to provide power for advanced drone technology and elite cavers from Poland who dropped into a 300-foot sinkhole during the expedition.

Jamie hiking through the Bladen River during the 2016 National Geographic Waitt expedition. Photo credit: Kasia Biernacka

While Dan’s interactions with Jamie would revolve around their shared passion for the biodiversity of this exceptional region of the world, my time spent with Dr. Rotenberg centered on the development and implementation of seven field courses.  In true fashion, Jamie always knew how to shake things up and challenged me to expand my own horizons as Director of Educational Programs at BFREE leading to new field course locations like Crooked Tree Wildlife Sanctuary or Tikal in Guatemala. I met Jamie’s lovely and spunky life companion, Vibeke, while working with them to plan and execute an innovative course for biology and art/architecture majors focused on the art and architecture of Maya archaeological sites and structures and the biodiversity found around these anthropogenic structures.  Another creative collaboration with Dr. Rotenberg focused on Environmental Psychology with both environmental sciences and psychology majors. 
 
Our field course adventures were always informative, stimulating, sometimes challenging, and full of surprises but it was those challenges that strengthened the bonds of what is sure to be a lifelong friendship.  It is with great delight that Dan and I welcome them into the wonderful world of “retirement”.  We look forward to learning more about what new adventures await and how we can participate. To quote my comedian spouse, Dan, “After all, snails and birds rule, everything else drools!”


Jamie and Jacob Marlin proudly hold the 2012 Partners in Flight Award for Bird Conservation that was awarded to BFREE.

From Jacob Marlin, BFREE Executive Director:

From the first time Jamie came to BFREE back almost two decades ago, he has played a key role in so many of our conservation programs. From leading our bird research and monitoring efforts, including the rediscovery of a wild breeding population of Harpy eagles, to training young Belizeans to be bird biologists. His passion for teaching brought hundreds of students from the USA to BFREE on study abroad programs for more than a decade. In 2014, BFREE was honored to have Jamie join the board of directors, where he currently serves as vice-president. Over the many years, Jamie and Vibeke have continued to support BFREE in countless ways, always believing in us and our mission. They are both true partners in conservation. Congratulations to this dynamic husband and wife team!


Jamie examines a bird for data collection during a research trip to Belize.

From Marlyn Cruz Sierra, BFREE Staff Member 2012 – 2014:

 Working along with people who share an incredible passion for what they do is one of those experiences that you will always cherish. For me, Dr. James is that person. He transmitted this passion and love of his work and projects when I participated as an avian technician at BFREE, so it never really felt like “work.” He was always very communicative and incredibly organized. He was unselfish with the wealth of knowledge he possessed, willing to give you an opportunity for growth, and cheering you on while you accepted new challenges.


Gato Pop center and Jamie top right along with the Harpy Avian Team in 2008 at BFREE.

From Liberato “Gato” Pop, BFREE Staff Member 2006 – 2015:

I would like to say that Dr. Jamie has been a great mentor for me. He has guided me through numerous trainings to become an expert avian researcher. He has always encouraged me to continue what I love and that is working with nature.

I want to thank Dr. Jamie and Dr. Vibeke for their support of our bird banding project for the past years at BFREE.


Jamie and Vibeke pose with students from UNCW during their BFREE Field Course.

From Heather Barrett, BFREE Deputy Director:

I admire how well Jamie and Vibeke have participated in each other’s professional and personal interests over the years. Although they have focused their careers on different continents, they remain a strong team supporting one another by each being engaged in the pursuits of the other. Jamie picked Central America and the sciences for his research while Vibeke chose Europe and the arts for hers. Instead of allowing their differences to divide them, they used them as an opportunity to explore the world together. With that model in mind, I’d say the sky is the limit for their shared retirement. Congratulations, Jamie and Vibeke!


Jamie and Lisa reunited after a decade at a 2017 BFREE Fundraiser in DC

From Lisa Ramsden, UNCW Alum and BFREE Field Course Participant 2007:

Dr. Rotenberg fostered my deep love of tropical ecosystems and birds through his classes at UNCW. I am so thankful that I particpated in his Environmental Psychology course that took students to Belize and that I was able to visit BFREE. It was a truly eye-opening experience for me. I feel so lucky to have taken a variety of classes with him and to have gotten the wonderful experience to intern with him on his Painted Bunting project. Congratulations on your retirement, wishing you all the best!


James and Jamie in Belize

From James Abbott, UNCW Alum, BFREE Field Course Participant and Assistant Researcher:

Congratulations Dr. Rotenberg on your retirement. You have been an amazing mentor to me. I believe that even more than the knowledge, experience, and skills, you passed on to me; the biggest influence I carry with me everyday is your attitude toward life and teaching demeanor and style. Those have and continue to shape my career in environmental education. Not to mention my unofficial role as the painted bunting ambassador to all of southeast VA – our region’s newest breeding bird. I cannot thank you enough for everything you have done for me and I hope we can meet up again someday at BFREE and enjoy a field station harpy eagle together.


Restore Our Earth — Happy Earth Day!

The Bladen River at BFREE. Photo by Head Ranger, Sipriano Canti

Today marks what is now the most widely observed secular holiday across the globe, Earth Day! Celebrated April 22nd annually, organizations and individuals come together to demonstrate support for environmental protection. This year’s earthday.org theme is “Restore Our Earth.” The theme rejects the notion that mitigation or adaptation are the only ways to address climate change but that it is up to every one of us to Restore Our Earth. 

“Restore” is not a new theme for us at BFREE; in fact, it is a significant theme to all that we do. 

Restoring tropical rainforest. Our cacao-based agroforestry program was created as a strategy to conserve and restore tropical rainforests in Belize. 

Restoring watersheds. BFREE has partnered with the Monkey River Watershed Association working to conserve and restore the integrity of the entire Monkey River Watershed. 

Restoring habitats. Through extensive management and protection of the BFREE reserve, our rangers are restoring habitats to ensure BFREE remains a hotspot for biodiversity. 

Restoring wildlife. Our Hicatee Conservation and Research Center is restoring local populations through captive-breeding and release programs. 

Our success in restoring wildlife and wildlands is because of our relentless stewardship, innovative strategies, and your support. As we celebrate our 25th Earth Day at BFREE this year, we know that there is still plenty of work to be done – but together, we can Restore Our Earth. 

Happy Earth Day! 

BFREE Fellows Participate in Ranger Weekend

BFREE’s Science and Education Fellowship program is a two-year immersive training opportunity for recent Belizean junior college graduates who exhibit leadership potential combined and a clear interest in the conservation of the country’s natural resources. Each Fellows are assigned one of three focal areas based on their interest and experience, Wildlife conservation – Hicatee Conservation, Sustainable Agriculture – Cacao Agroforestry or Protected Areas.


Lenardo Ash (Sustainable Agriculture/Cacao Agroforestry) and Jonathan Dubon (Wildlife Conservation/Hicatee Conservation) are BFREE’s current fellows and have been learning a lot in their focal area. They also have the opportunity to take place in unique professional development opportunities during their two years. This may include trainings, conference attendance, presenting information to groups, and various field experiences.


With strict restrictions due to the pandemic, there were few opportunities for Fellows to travel during 2020. We decided to start the new year off in 2021 by creating training opportunities right here at BFREE. Lenardo and Jonathan joined BFREE Park Rangers, Sipriano Canti and Apolonio Pop for a ranger training weekend. Friday afternoon, the team hiked to their camp spot about two miles from the main facilities. They set up camp and then immediately went to deploy camera traps in the area. The weekend was spent exploring the properties’ many trails while monitoring camera traps and searching for tracks and other signs of wildlife along the way.


The Fellows learned the basics of surviving in the jungle with skills like building a fire and locating water vines. Canti described traditional uses of plants and trees found along the way. The team also updated and posted Private Property signs throughout the area. They explored creeks and lagoons in the area while discovering the many types of habitat that exist within the BFREE property.

BFREE Fellow, Jonathan Dubon during the Ranger Weekend in January 2021.

Some highlights for Jonathan were visiting a pretty lagoon where they saw an Agami Heron. Canti named it “Live Lagoon” because of the little spring that supplies the lagoon with fresh water. Jonathan was also excited to capture an image of a male Tapir on one of the camera traps they set. Volunteers and interns have always loved Ranger Weekends at BFREE, and we are excited to extend this opportunity to BFREE Fellows for the coming years!


Pale-billed Woodpecker Sighting

Gato Pop taking a photo of the Pale-billed woodpecker at BFREE.

Liberato (Gato) Pop was a BFREE Avian Technician from 2006 – 2013. He began working with us when he was just 16 years old as a member of the Harpy Eagle research team. Gato now works as a Park Ranger for TIDE but continues to do contract work with us from time to time. He regularly helps teach field courses and he also documents our resident and migrant birds.

This month, he began a monitoring project to document which birds utilize the young cacao agroforest. Our intention is for him to continue to collect data in coming years, so that we can understand how the bird population changes over time.

Gato’s visit in February was his first time to BFREE since early 2020. The first bird he noticed was a Pale-billed Woodpecker, which, while a wonderful, resident bird, is not an unusual sight. Still, he was thrilled and immediately searched with his binoculars for a band on the bird’s leg. He located the band and began taking photos to document this finding. This bird, he explained, was the only Pale-billed Woodpecker that he and William Garcia, previous BFREE Bird Project Leader, ever banded. Since the program ended in 2013, he estimates that they placed the band in 2011 – 10 years ago!

Pale-billed Woodpeckers (Campephilus guatemalensis)

are the largest woodpeckers in Belize and have a full red head. They commonly eat large larva of wood-boring beetles which they remove from the trunks and limbs of large decaying trees. Much to Jacob Marlin’s dismay, they are also very fond of burrowing into cacao pods. The one Gato spotted was in the forest opposite the cacao searching for food on a dead tree.

While woodpeckers are more long-lived than smaller birds, we are excited to know that this woodpecker has utilized the BFREE Privately Protected Area for so many years. We also thankful to Gato Pop for documenting this sighting!

Banded Pale-billed woodpecker spotted at BFREE by Gato Pop while conducting bird research in February 2021.

BFREE’s Bounty of Birds

For the past three years, BFREE has had Harpy eagle visitors in late February. So that means we are spending a lot of time looking up! Scouring the tops of trees like Ceiba and Prickly Yellow where we’ve seen them previously perched in hopes that 2021 will be good to us. We’ve recorded 20 separate observations within the BFREE reserve since the first one in September 2016. The most recent was by Sipriano Canti last November.

To us, it is spectacular to witness this enormous and awe-inspiring raptor. We are reminded that having Harpies around means that BFREE and the Maya Mountains remain healthy and intact enough to support this top predator.

And the Harpy isn’t the only bird indicator that the BFREE reserve is an oasis for wildlife. Our Ranger team has diligently recorded Scarlet Macaw sightings on an almost daily basis since August 3, 2020.

We don’t want the rangers to have all of the fun though! So some of the staff have started to document birds using both ebird.org and printed observation sheets. As a 2021 challenge, Nelly Cadle and I began recording a list every day. Doing this helps us to become better birders while also documenting which birds inhabit BFREE. We often ask Tom Pop for help with IDs because he is excellent at identifying birds by song and calls. Lenardo Ash has also become interested in birding and has started recording sightings with us. Finally, we can always count on Sipriano Canti to snap pics and record bird observations around BFREE because he and his ranger team are constantly on the move and have the greatest opportunity to spot amazing birds and other wildlife.

Being at BFREE nurtures our love for this country’s incredible wildlife and inspires us to continue our role as stewards of this rare and spectacular place.

Below are photos BFREE staff took of birds at BFREE in 2020 and 2021.

Land Snails of Belize Book Receives Five-Star Reviews!

In 2019, we shared that 17 new land snails were discovered in Belize by husband and wife team, Dan and Judy Dourson, and their colleague, Dr. Ron Caldwell.

Before the team’s research began in 2006, only 24 species of land snails were reported from Belize. Over the next decade, a total of 158 native land snails with 17 species new to science were documented. The Dourson’s spent seven of those years living at BFREE, and the BFREE Field Station became home-base for the snail research team for over a decade.

The long-term research resulted in the development of the first field guide for the region, Land Snails of Belize, A Chronicle of Diversity and Function, and the first comprehensive publication since the early 1900s for Central America. The book is presented as a reference to both the biologist and citizen scientist alike and includes a brief history of research in the region, status of current research, how to collect land snails, shell morphology, anatomy and terminology, and species accounts. The book contains more than 750 color images and diagnostic features highlighted for each of the 158 species.

Five-star reviews for the book, Land Snails of Belize:

Since the release of their book, we have heard from many just how useful this resource has been. But don’t just take our word for it, read some of the reviews below! And be sure to pick up your own copy here: Purchase Land Snails of Belize on Amazon

“I just received my copy of this book and I write to commend you. I am not a malacologist so I can not speak to the technical taxonomic aspects of the work. However, I have written a few natural history books and collected many hundreds more. Based on this, I think that you have produced a masterpiece of natural history- a work that will inspire me and many others to learn about and work on this fascinating group. Thank you. I look forward to seeing some of your other books on this topic.”

– Adrian Forsyth, author of, Tropical Nature: Life and Death in the Rain Forests of Central and South America

“There are many photo guide books for marine shells (and mammals, birds, reptiles, and so on) in Central America, but none for land snails. These guide books are useful for biologists and those of related professions to keep track of all the taxa and to teach students or explain or show something to someone who is not an invertebrate expert. And they are wonderful for nature lovers who want to identify something in their backyard. Land snails in the tropics have an amazing amount of diversity, and we’re just starting to understand their different niches, behaviors, and relationships.

This book is up-to-date with most of the (albeit limited) studies on land snails in Belize. The scientific names are correct (at least for now), the organization of the book is very clear to follow, the descriptions are useful, the photos are fantastic, and the maps with known localities are incredibly useful. This is a valuable book for invertebrate enthusiasts in the tropics. The background at the beginning regarding snail behavior (as well as throughout the book, where relevant), along with associated pictures (wolfsnails attacking prey, various animals interacting with snails like the snake on the cover) are very useful, making this more than just a book on identifications and bringing these snails to life. It also has beautiful drawings and close-up photos of shell patterns and ridging for identification, including different colormorphs of the same species.

In addition to land snails in Belize, there are some useful sections regarding freshwater invertebrates (also, alas, understudied in this region of the world) and slugs. For invertebrate enthusiasts, this is a great guide with beautiful photos and some funny sketches. For anyone who works with these critters in and around Belize, it’s an absolutely excellent resource.”

– Anzu

“If you are interested in the snail of this region you must get this. It’s also well done, informative in general ways, and the ways of snails. A great work, and necessary if you’re a snailologist. (FYI that’s not really a word).”

– B. J. Stephen

Land Snail Citizen Science in Belize:

If you are in Belize, visit our blog, Un-Belizeable Land Snail Activity to learn how you can participate in citizen science. Submit your snail findings by email to contact@bfreebz.org. Download Land Snail Diversity of Belize card here.

Un-Belizeable Land Snails Activity

Land snails in Belize can be found in a variety of habitats.  They are important food for many birds that live in Belize including currasow, crested guan, and other larger birds.  Coatis and other mammals also eat land snails. 

Biodiversity:  The health of an ecosystem can be determined by the different kinds of land snails found in an area or it’s biodiversity. Read the introduction of the attached card to learn more about the importance of land snails in Belize. Download Land Snail Diversity of Belize card here.

Citizen Science: Participate in our on-going research of the land snails of Belize by going out in your backyard or neighborhood to search for land snails.

Because this is the dry season, you will likely not find many live snails but that’s okay!!  You don’t need live animals to figure out what species (kind) of snail they are.  All you need is the shells.

Activity: HOW TO LOOK FOR AND COLLECT LAND SNAILS

Snails like moist places (but not too wet!) where plants are growing. 

  • Get a stick and use it to scrape leaves and sticks at the base of plants and trees.
  • Look around the edges of concrete buildings (snails like calcium for building their shells and can often find it on concrete).
  • Pick up as many shells as you can.
  • Take the shells back to your house and if you have a ruler, measure the length of the snails (using millimeters or mm).
  • Use the attached card to figure out which group of snails they belong to.
  • Write down your answers.
  • Abundance:  Count how many of each type of snail you find.  Make a graph to show your results.

Finally, if you have a phone that takes pictures, take pictures of your snails along with what you think they are and send them to contact@bfreebz.org or post on Facebook and tag @bfreebelize!

Download Land Snail Diversity of Belize card here.