Platymantis biak
The adult male frog is about 32.3 to 39.9 mm long from nose to rear end and the adult female frog is 37.4 - 42.4 mm long.  This frog has a larger body and larger disks on the ends of its toes than other frogs in Platymantis.  It has a mark on its back like the letter W, but it is not always easy to see.