The Kamasutra, froggy style

This picture received from the Department of Environmental Studies at Delhi University on June 14, 2016 shows Bombay Night frogs in Dorsal straddle. -Delhi University/AFP/SD Biju

PARIS: The Bombay night frog, scientists revealed Tuesday, favours a mating position previously unknown among the amphibian group’s 7,000 species, only the seventh catalogued in what might be called the Kamasutra for frogs.

Dubbed the “dorsal straddle,” the new nuptial is an evolutionary case study in how sexual selection always finds a way -- no matter how contorted or acrobatic -- for sperm and egg to hook up.