Water Gardening: For the love of amphibians!, 1 by WUVIE

WUVIE wrote:
Acris crepitans blanchardi - formerly referred to as Blanchard's
Cricket Frog, a.k.a. Acris crepitans crepitans - Eastern Cricket Frog.

A tiny little fellow with an interesting sound similar (at least to me) to
that of a ping pong ball being dropped on a hard surface once, then
twice, three times and such, then progressively faster until the sounds
blend together. Note the tell-tale triangle on it's head.