Category Archives: Natural history

Giving Crowned Tree Frogs a Head Start in the Wild

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What makes a good home for a crowned tree frog Triprion spinosus? That’s the question Smithsonian scientists set out to answer as they work to reintroduce captive-bred frogs back into their natural habitat.

In the wild, male crowned tree frogs are picky about real estate. They search for water-filled tree cavities where they call out to potential mates. If a female approves of his choice, she’ll lay her eggs in that carefully selected pool.

But when releasing frogs bred under human care, researchers wanted to stack the odds in their favor. The solution? Build artificial tree holes from different materials and let the frogs choose their favorites.

Newly released frogs began exploring right away, and we were able to track their movements for the first few weeks using a radiotransmitter. Before long, their calls echoed through the forest as they settled into their new homes, we will continue monitoring the artificial tree holes to see if we get any eggs laid in these structures and continue to explore other tree hole designs.

This research is part of the Tropical Amphibian Research Initiative, supported by the Bezos Earth Fund and conducted through collaboration among the Panama Amphibian Rescue and Conservation Project.

The Enchanting Tungara Frog Call: A Soundtrack to Latin American Nights

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From the humid lowlands of Mexico to the tropical forests of Colombia, one sound unites the nocturnal chorus of Latin America: the distinctive tungara frog call. These small amphibians, scientifically known as Engystomops pustulosus, create one of nature’s most recognizable and beloved soundscapes across Central and South America.

The Magic of Tungara Frog Sounds

The tungara frog call is unmistakable—a sharp “tunk” followed by a descending whine that sounds almost electronic. Males gather near temporary pools, ponds, and puddles after rainfall, creating symphonies that can be heard for miles. Their vocalizations serve a crucial purpose: attracting females during breeding season, which typically coincides with the rainy months.

Cultural Connection Across Generations

For millions of people across Latin America, tungara frog sounds represent more than just amphibian biology—they’re the soundtrack to childhood memories, rainy evenings, and the rhythm of tropical life. Grandparents in rural villages often tell stories timed to the evening chorus, while children learn to identify the approach of rain by the intensity of the frogs’ calls.

Natural History and Habitat

Tungara frogs are remarkably adaptable, thriving in both pristine rainforests and human-modified landscapes. They prefer shallow, temporary water sources for breeding, making them common around homes, farms, and urban areas. This adaptability has helped preserve their populations even as development spreads across their range.

These resilient amphibians typically measure just 2-3 centimeters long, with bumpy, warty skin that helps them blend into leaf litter during daylight hours. Their calls intensify during peak rainy season, creating the iconic soundscape that has become synonymous with tropical nights from Mexico’s Yucatan Peninsula to Colombia’s Pacific coast.

The tungara frog’s voice continues to connect communities across Latin America, proving that sometimes the smallest creatures create the most enduring memories.