Thie city of Rayne, Louisiana, calls itself the Frog Capital of the World (also the Louisiana City of Murals, which feature frogs) and is host each year to the Rayne Frog Festival. There is, of course, a frog jumping contest. Rayne's claim to their title comes from a thriving frog export business, begun in the 1880s and lasting until the 1960s when population growth and habitat change caused a drop in the frog population. But it was good while it lasted--even Sardi's in New York City got their frog legs from Rayne. The festival started in 1973.
My two event covers, both hand-drawn and hand-colored, are from the early 1980s.