How did frogs evolve?
Frogs evolved from ancestors that looked like living salamanders which themselves look like lizards with smooth moist skins instead of dry scaly skins. Frogs probably evolved in the Triassic period, more than 200 million years ago. The first fossil that everyone agrees is almost certainly a frog is Triadobatrachus from the Lower Triassic in Madagascar. The Lower Triassic was approximately 240 to 245 million years ago. But imagine how difficult it is to identify the “first” of any kind of plant or animal. You need a fossil that shows the critical feature of that group of animals. What part of a frog do you think you would need to tell that it was a frog. One tooth? One toe bone? A leg bone?
Frogs evolved from ancestors that looked like living salamanders which themselves look like lizards with smooth moist skins instead of dry scaly skins. Frogs probably evolved in the Triassic, more than 200 million years ago. The first fossil that everyone agrees is almost certainly a frog is Triadobatrachus from the Lower Triassic in Madagascar. The Lower Triassic was approximately 240 to 245 million years ago. But imagine how difficult it is to identify the “first” of any kind of plant or animal. You need a fossil that shows the critical feature of that group of animals. What part of a frog do you think you would need to tell that it was a frog. One tooth? One toe bone? A leg bone?
Frogs evolved from ancestors that looked like living salamanders which themselves look … www.frogsaustralia.net.au Frogs Frogs [ Home ] [ By Location ] [ Birds ] [ Bugs ] [ Fish ] [ Mammals ] [ Reptiles ] [ Nature Photography Guide ] [ Nature Photographers ] [ Site Map ] Frogs Poison Arrow Frog Photo from Costa Rica. Taken by Jerry Kumery. Copyright 2006, MyNaturePhotos.com Photos may not be used without permission, except for “fair use”, such as educational purposes (for example, a student’s school report). You … mynaturephotos.com Pond educational resource pack – birds Cornwall, but their populations are boosted in winter by immigrants from colder countries. The birds which come to mind most readily when fresh water is mentioned are members of the duck … wading bird, which stalks fish (and is viewed as an enemy by many fish keepers), frogs, voles, young birds, snails, crustaceans and insects. It is the second-largest common bird in Britain, the … www.cornwallwildlifetrust.org
