I guess you can call them transgender frogs.
A group of Yale ecologists have found a surprising number of male frogs around Connecticut with very distinct properties that make them different from other male frogs. These frogs are carrying eggs, and the Yale team told the Waterbury Republican American they can't seem to figure out why.
"Seeing rates of deformity that high has been enormously surprising," Yale researcher David Skelly told Republican American.
Skelly and his team collected frogs in 24 ponds in 10 different cities and towns along the Connecticut River Valley. They found one in eight male frogs had developed both sperm and eggs in their reproductive systems, according to the paper. Skelly said that number rose to one in five in suburban areas, and dropped to near zero in for rested areas.