It is clear that the factors that direct the development of a wood frog's egg so that it becomes a wood-frog and not a tree-toad must lie in the egg itself, as derivatives from the two parent organisms.    From Wordnik.com.  [The Doctrine of Evolution Its Basis and Its Scope] Reference

One day early in June I took a wood-frog in my hand.    From Wordnik.com.  [The Arctic Prairies : a Canoe-Journey of 2,000 Miles in Search of the Caribou; Being the Account of a Voyage to the Region North of Aylemer Lake] Reference

Just an ordinary snake, but with it a live wood-frog!.    From Wordnik.com.  [Roof and Meadow] Reference

Dropping the rake, we cautiously follow up the call (it seems to speak out of every tree-trunk!) and find the piper clinging to a twig, no salamander at all, but a tiny wood-frog.    From Wordnik.com.  [The Hills of Hingham] Reference

For three hours a day, on six consecutive days, the team exposed wood-frog eggs to water from a bucket containing crushed tadpoles mixed with water from a bucket housing fire-belly newts.    From Wordnik.com.  [clusterflock] Reference