The bird is building a nest of straw and twigs.（英译中)

AA greenhouse is a building made of glass which is used for keeping plants warm when the o

听力原文：There is a bird in the tree． A．B．C．

If a cat comes too close to its nest， the mocking bird initiates a set of actions to prot

What is the influence of more pesticide use on birds？A．There is no place for birds to nest

Each kind of bird has its own way ____a nest, and it is always the same way.A: of bu

A.How birds learn to build nests.B.Why birds lay eggs.C.How birds nests have evolved.