Specific time of exposure during tadpole development influences biological effects of the insecticide carbaryl in green frogs (Lithobates clamitans)

► Carbaryl acts as an endocrine disruptor later in tadpole development. ► Exposure at 16 weeks posthatching resulted in tail and brain transcript changes. ► Survival, time, and size at metamorphosis were not affected by carbaryl. ► Changes in transcripts months after exposure suggest long-term consequences.