Nigel Cattlin / Chinese edible frogs (Hoplobatrachus rugulosus) in net bag at market, alive. Bangkok, Thailand.

Sandesh Kadur / Timelapse of a puddle drying out, killing a large number of Indian bullfrog (Hoplobatrachus tigerinus) tadpoles, Honnavar, Karnataka, India.

Sandesh Kadur / Timelapse of a puddle drying out, killing a large number of Indian bullfrog (Hoplobatrachus tigerinus) tadpoles, Honnavar, Karnataka, India.

Bert Willaert / Crowned Bullfrog (Hoplobatrachus occipitalis) portrait. Bobiri Butterfly Sanctuary, Ghana.

Ian Lockwood / Indian bullfrog (Rana tigerina) India

Stephen Dalton / Chinese tree frog (Rana chinensis / rugulosus) controlled conditions

Stephen Dalton / Chinese tree frog (Rana chinensis / rugulosus) on leaf, vocalising, controlled conditions

Stephen Dalton / Chinese tree frog {Rana chinensis / rugulosus} on curled leaf, controlled conditions, from China

Stephen Dalton / Chinese tree frog {Rana chinensis / rugulosus} sitting on curled leaf, calling, controlled conditions, from China

Inaki Relanzon / Tiger frog (Hoplobatrachus tigerinusi) sold for food in Tanarive Market, Madagascar.

Inaki Relanzon / Tiger frog (Hoplobatrachus tigerinusi) sold for food in Tanarive Market, Madagascar.

Inaki Relanzon / Tiger frog (Hoplobatrachus tigerinusi) sold for food in Antananarive Market, Madagascar.