- Some frogs spend most of their time - underground, but most are terrestrial or - arboreal after they metamorphose. - Fertilization is usually external with frogs. Males - (usually) grasp the females (called amplexus) and fertilize the eggs as they are deposited. Toad Mountain Harlequin Frog - Terrestrial Adult Mazatlán Narrow- - Leaves water, loses tail Some females may lay up to 20,000 eggs! Some tiny frogs hatch fully formed, as they - are too small to start as tadpoles! - 1) Photos by Todd Pierson Subterranean Frog Couch’s Spadefoot - The recently-extinct Gastric-brooding Frog would turn off its digestion and swallow its - eggs to let them develop in its stomach!
This lesson is part of Certified Herpetological Guide. Enrollment is self-paced, with no deadline to finish (about 50 hours).
