Among the inoffensive species are counted the graceful green " tree snake," which pursues frogs, birds and lizards to the topmost branches of the forest; also several species of pythons, the commonest of which is known as the carpet snake.
The parents pay no further attention to them, except the pythons, which incubate their eggs by coiling their body over them, and fiercely defend them.
The pythons (q.v.) are restricted to the palaeotropical and Australian regions, with the sole exception of Loxocemus bicolor in southern Mexico.
Pythons occur throughout the group, and sometimes attain enormous size.
Serpents are very common, both venomous and non-venomous; the pythons attain a great size.
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