Amphibians
Eastern Narrowmouth Toad
Gastrophryne carolinensis · also called eastern narrow-mouthed toad, eastern narrowmouth toads
Pushing its small, pointed head into the entrance of an ant nest, an eastern narrowmouth toad works its way toward a meal that most other amphibians could never reach, its narrow skull built specifically for exactly this kind of tight, defended tunnel.
Overview
The eastern narrowmouth toad, Gastrophryne carolinensis, is a small, smooth-bodied amphibian native to forest and wetland-edge habitat across a broad range of the southeastern United States. Its unusually pointed head built for raiding ant and termite nests, protective eye-fold defence against stings, and occasional burrow-sharing with tarantulas make it one of the more specialised and behaviourally unusual toads in North America.
A toad built to eat what others cannot reach
Where most amphibians settle for whatever insects come within easy reach, the eastern narrowmouth toad’s narrow, pointed head lets it push directly into ant and termite nests that would keep almost any other toad firmly locked out.
Status
Least Concern — widespread and common across suitable forest and wetland-edge habitat throughout the southeastern United States.
Eastern Narrowmouth Toad: common questions
Why does the eastern narrowmouth toad have such a small head?
This species has evolved an unusually small, narrow, pointed head relative to its rounded body, an adaptation that lets it push into the tight tunnels of ant and termite nests, food sources most other amphibians with wider heads simply cannot access as efficiently.
How does the eastern narrowmouth toad protect itself while eating ants?
This species has a distinctive fold of skin just above the eyes that can be pulled down over the face, offering some protection from ant bites and stings while the toad feeds within a nest, a specialised defence suited to its close dietary dependence on ants and termites.
Does the eastern narrowmouth toad really live with tarantulas?
This species has occasionally been documented sharing burrows with tarantulas in parts of its range, a loose association thought to provide the toad with shelter while it may help the spider by eating small pest insects that could otherwise harm the spider's eggs, though the exact nature and consistency of this relationship is still not fully understood.
What does the eastern narrowmouth toad's call sound like?
A male of this species produces a loud, buzzing call during the breeding season, often compared to a bleating sheep or an electric buzzer, a distinctive sound quite different from the more musical trills or chirps produced by many other frog and toad species.