american toad for sale (adult)

A. americanus eggs are bicolored. They are often a roughly equal mixture of a black or brown with white or cream. The eggs are deposited in two long ropes that have been recorded to transcend 60 m in length. Single egg diameter ranges from 0.1 cm to 0.2 cm.

Studies have shown that they have a mutualistic relationship with Chlorogonium algae, which makes tadpoles develop faster than normal.

Leaf litter from invasive plants like autumn olive or purple loosestrife in the larval nursery can increase the burden of trematode parasite infestation among tadpoles. This is possibly mediated by faster development of tadpoles in these aquatic environments than in nurseries with leaves of native black huckleberry or swamp loosestrife.

American toad for sale tadpoles have several mechanisms to reduce predation.  They avoid predators by swimming in very shallow water often with thick grass vegetation and by swimming close together in schools during the day.

Tadpoles also produce toxic chemicals in their skin that discourage some predation. Fish have been reported to die after consuming one tadpole; however, most fish quickly learn to avoid eating American toad tadpoles.

Based on DNA sequence comparisons, Anaxyrus americanus and other North American species of Anaxyrus are thought to be descended from an invasion of toads from South America prior to the formation of the Isthmus of Panama land bridge, presumably by means of rafting.