The Surinam hollow frog, known scientifically as Trachycephalus coriaceus, is a remarkable amphibian that exhibits a fascinating and unusual trait: it has the ability to “deflate” its body by contracting its lungs, while simultaneously expanding its vocal sacs to produce sound. This intriguing adaptation not only highlights the unique physiology of the species but also plays a significant role in its communication and mating behaviors.

While the frog contracts its body, its vocal sacs—located on either side of its throat—expand. This dual-functionality allows the frog to produce distinctive calls that carry over long distances. The sounds serve various purposes, including attracting mates and establishing territory, making vocalization a critical aspect of its behavior.

The Surinam hollow frog is typically found in the humid tropical forests of Suriname and surrounding regions. It favors environments rich in vegetation, where it can remain hidden from both predators and prey. The species is primarily nocturnal, engaging in most of its activities, including calling and foraging, during the night.

As with many amphibians, the Surinam hollow frog faces threats from habitat loss and environmental changes. Deforestation and climate change can significantly impact its populations and habitats. Conservation efforts aimed at preserving tropical forests are essential for ensuring the survival of this unique species and its ecological niche.