Before their species respective breeding season. In some areas and for some species, that is spring. In Pennsylvania, Great Horned Owls have built and are on eggs in January. In the south, there are species that breed throughout the year.
Normally in late winter or early spring in preparation for the spring/summer which is the best time to rear young.
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in the spring
No. Kakapo make their own nests and do not share them with any other birds.
Nature. Bees are insects. Birds make nests.
Chitens
In their nests, where ever they make them.
These birds build nests in trees, usually in groups called rookeries.
Yes, like most birds.
Owls do make their own nests.In fact they look alot like birds nest's but bigger.
Its all they have to use in the wild.
Cuckoos and cowbirds lay their eggs in other birds' nests, and leave them for the other bird to raise. Weavers and whydahs (African species) also do this.
Squirrels make nests (similar to birds' nests) inside a hollow portion of a tree. That is where they sleep and raise their young.
in some cactus birds make nests.
Birds have a very special way of ding things, they love to build because its part of their personality and will help them survive. They also like to improve their nests because they can.