| Centrolenidae | Ambystoma tigrinum | Caecilia nigricans
Common Name | Glass Frog | Tiger Salamander | Black Caecilians
Location and Habitat Information | Central or South America.  Moist and hot climates, live close to streams  | Southwestern Canada, South and western America to northern Mexico, live in deep burrows in the ground | Found in South America, Africa, and India.  Live in rainforests, grasslands, and stream banks.  Hot moist climate
Physical Characteristics | Translucent skin, .75 to 3 inches, pale green color,  green or white bones, contain ocelli which are small eyes on the top of their bodies, organs are visible from the belly of the frog.   | Short snout, long tail, and sturdy legs, 6-8 inches, flat head, black and yellow  | Limbless, Very small eyes, scaly, slimy skin, contains a retractable tentacle on the side of their head, 
Behavioral Characteristics | Nocturnal,  hide in the leaves during the day due to the abundant amount of leaves,  can thin out their bodies so it is even harder to detect them.  Mate either every night(in a non changing environment) or the night after a heavy rainfall( in a changing environment) | Secrete a milky substance if in danger which is toxic,  Nocturnal and highly voracious, hibernate in the winter, some males will imitate females to get closer to the females without them knowing | Spends most of life underground, Use internal insemination, 25% lay eggs,