It was instead decided to produce a chocolate frog, branded as "Freddo Frog". Some frogs such as the wood frog or spring peeper can even survive being frozen. The use of the common names "frog" and "toad" has no taxonomic justification. An example is the interaction been tadpoles of the common frog and a freshwater snail. "Frog and Toad Together" on September 3, 1987. These include the skeletons of a rat, a frog and a dog. Imagine taking a picture of a frog on a lily-pad. Other vertebrates include cladotherian mammals, a pipoid frog, and ceratodontiform fishes. The endangered purple frog was discovered in 2003. Many species of frog have deep calls. He is quick to defend his name when people compare it to Kermit the Frog. The smoky jungle frog ("Leptodactylus pentadactylus") makes a nest of foam in a hollow. He has a pet frog named Shoofly. Examples include Michigan J. Frog, "The Frog Prince", and Kermit the Frog. The sexes of the goliath frog are similar.