Amphibians
Texas Toad
Anaxyrus speciosus · also called Texas toads
A single heavy summer downpour hits the Texas grassland, and within hours, thousands of Texas toads that spent weeks buried underground emerge at once, filling temporary pools with a chorus of high-pitched trilling calls before the water disappears again just as quickly as it arrived.
Overview
The Texas toad, Anaxyrus speciosus, is an explosively breeding amphibian native to arid grassland and desert habitat across Texas and neighbouring regions. Its rain-triggered breeding strategy and rapid tadpole development are finely tuned to the unpredictable rainfall typical of its native range.
A gamble timed to the sky
Rather than breeding on a fixed schedule, the Texas toad waits underground for the right storm, committing its entire reproductive effort to a narrow window of opportunity that depends entirely on when, and whether, sufficient rain actually falls.
Status
Least Concern — widespread and stable across suitable arid grassland and desert habitat throughout Texas and neighbouring regions.
Texas Toad: common questions
Why does the Texas toad breed so suddenly after rain?
A Texas toad breeds explosively in response to heavy summer rainfall, with large numbers of individuals emerging together to call and breed in newly formed temporary pools within a short window, a strategy that allows the species to complete breeding before the short-lived pools dry out again in its arid native range.
How does the Texas toad survive long dry spells?
A Texas toad is well adapted to survive extended dry periods typical of its arid range, generally sheltering underground or in burrows during unfavourable conditions and emerging specifically when rainfall creates suitable temporary breeding pools, allowing it to persist through months of otherwise unsuitable surface conditions.
Why do Texas toad tadpoles develop so quickly?
Texas toad tadpoles develop relatively quickly compared with many other amphibian species, an adaptation that allows them to complete their entire aquatic development before the short-lived temporary pools they hatch in dry up completely, a critical timing advantage given how unpredictable rainfall can be across the species' arid range.
Where does the Texas toad live?
The Texas toad is native to arid grassland and desert habitat across Texas and parts of neighbouring states, extending into northern Mexico, generally favouring open ground where temporary pools can form quickly following heavy summer rainfall.