Smithsonian Tropical Research Institute

Aaron O'Dea

Human Fishing Reshaped Caribbean Reef Food Webs, 7,000-Year-Old Exposed Fossilized Reefs Reveal

A groundbreaking study of 7,000-year-old exposed coral reef fossils reveals how human fishing has transformed Caribbean reef food webs: As sharks declined by 75 percent and fish preferred by humans became smaller, prey fish species flourished—doubling in numbers and growing larger. This unprecedented look into prehistoric reef communities shows how the loss of top predators cascaded through the entire food web, shifting the balance among coral reefs

Adult Túngara frog

Frog Tadpoles That Grew Up In The City Developed Faster But Ended Up Being Smaller

Have you ever wondered how city life affects animals like frogs? A new study reveals that urban Túngara frog tadpoles develop faster —but end up being smaller — than tadpoles from forests, probably resulting in smaller adults. This might be an adaptation to warmer urban puddles with fewer predators or to constantly changing environmental conditions in the city

The forest breathes

Above the Tropical Forest Canopy, Sensors Capture the Fluxes of Gases Between the Trees and the Atmosphere

The air moving above the forest carries valuable information about how trees absorb carbon, and what may happen in the future as global temperatures rise

Capuchin monkeys have been monkey-napping baby howler monkeys

Monkey-Nappers! A Group of Capuchin Monkeys Caught on Camera With Abducted Baby Howler Monkeys

Observations of Coiba's tool-using immature capuchin monkeys show them carrying abducted infant howler monkeys. What is the reason for this behavior?

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Birds by Day, Bats by Night: Paired Long-Term Census of Bats and Birds Starts in Panama

Research teams studying bats and birds gather in Panama’s Soberanía National Park to celebrate the launch of a long-term census of bats designed to complement the bird census, which will celebrate its 50th anniversary next year

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NASA Is Studying Tropical Ecosystems by Linking the Ground, Air and Space

A NASA plane came to Panama to acquire aerial images to inform scientists about the diversity of tropical ecosystems. At the same time, researchers from the Smithsonian Tropical Research Institute (STRI) in Panama collected similar data from the ground. The goal: to create an algorithm to better understand tropical ecosystems using satellite remote sensing in the future

Excavations at Cerro Juan Diaz in 1994

Archaeologists Study the Connections Between the Deceased Buried at Cerro Juan Díaz, Panama

Individuals recovered at the archaeological site of Cerro Juan Díaz shed more light on how the local communities buried and honored their dead

Fungi in Barro Colorado Island

How Even the Smallest Organisms Can Shape Entire Ecosystems and Inspire Lasting Change

From sonic tomographies to global biodiversity negotiations, this journey through research, resilience, and connection reveals how small organisms, death and decay bring about new life

Cover_Newly hatched White-necked Jacobin chick

Possible Caterpillar-Like Baby Hummingbird Discovered in Panama

A baby hummingbird hatches. But it has fluffy feathers on its back, looking just like a dangerous caterpillar. Could this be something unusual among hummingbirds?

Frog defenders

Bezos Earth Fund Gives $2 Million Grant to Launch Groundbreaking Amphibian Conservation Project Across Latin America

A grant from the Bezos Earth Fund to help save 25 frog species through conservation, rewilding and disease prevention efforts

Dendrology course field trip

A New Course by ForestGEO Experts Teaches the Biodiversity of Panamanian Forests

Through a course in dendrology, the study of the taxonomy of woody plants in the absence of flowers or fruits, two experts in forest diversity seek to leave a legacy of knowledge for future generations

Cover

A Composting Fly Could Significantly Reduce Organic Waste at the Smithsonian Institution

An innovative and low-cost project aims to bio-convert food scraps into fertilizer, animal feed and extractable oil using the Black Soldier Fly

Illustration from the cover of "The First 100 Years of Research on Barro Colorado: Plant and Ecosystem Science (Volumes 1 and 2)"

The First Volumes of the BCI 100 Celebration Series Are Now Available Online

To celebrate a century of scientific research in the Barro Colorado Nature Monument, a series of volumes will provide a record of the major contributions to plant and ecosystem science, animal science, and the physical environment for future generations of researchers

Carollia perspicillata

Bat Salad: First Record of Bats Eating Entire Leaves and Not Spitting Them Out

Bats are known to chew and spit out leaves, like humans chew and spit out tobacco or coca, but this is the first continuous recording of a bat eating entire leaves

Spix's disk-winged bats inside their leaf tube

Listen Up! Hungry Bats Emit Food Calls to Family and Friends

Spix’s disc-winged bats shrieked when they were first shown mealworms, a new food for them. Were they alarmed, or were they communicating their excitement to their fellow bats?

Annette Aiello

A Lifelong Passion for Tropical Insects Leads to Generous Support

A fund set up by STRI staff scientist Annette Aiello intends to provide long-term funding for the preservation and management of the insect collection at the Smithsonian Tropical Research Institute in Panama, highlighting the importance of reference collections for the advancement of science

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'Scientists for Scientists' Wartime Grant Brings Ukrainian Bat Biologists to Panama

Over the last two years, staff at the Ukrainian Bat Rehabilitation Center have worked to save bats from the dangers of the Russian full-scale invasion. Now, they join researchers at the Smithsonian Tropical Research Institute to study bat behavior in Panama

Imama

Between Pasture and Forest: The Crusade to Protect the Jaguar in Panama

Fundación Yaguará Panamá not only leads the protection of the largest feline in the Americas in cattle ranching areas of the country, but also promotes gender equality by actively involving women in key roles in the project, both at the scientific and community levels.

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Red-Eyed Treefrog Eggs Hatch a Plan to Escape Warming Temperatures

A new study from the Smithsonian Tropical Research Institute (STRI) shows that red-eyed treefrog embryos hatch early when exposed to high ammonia levels — an environmental cue that it’s too hot and dry for the eggs to survive

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