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Sociable weavers construct permanent nests on trees and other tall objects. These nests are amongst the largest built by any bird, and are large enough to house over 100 pairs of birds, [10] containing several generations at a time. The nests are highly structured and provide birds with a more advantageous temperature relative to the outside.
Other birds often built their own nests on top of Weaver nest sites. [4] Some birds build nests in trees, some (such as eagles, vultures, and many seabirds) will build them on rocky ledges, and others nest on the ground or in burrows. [3] Each species has a characteristic nest style, but few are particular about where they build their nests.
Deep cup nest of the great reed-warbler. A bird nest is the spot in which a bird lays and incubates its eggs and raises its young. Although the term popularly refers to a specific structure made by the bird itself—such as the grassy cup nest of the American robin or Eurasian blackbird, or the elaborately woven hanging nest of the Montezuma oropendola or the village weaver—that is too ...
Especially in warmer areas, the house sparrow may build its nests in the open, on the branches of trees, especially evergreens and hawthorns, or in the nests of large birds such as storks or magpies. [ 133 ] [ 142 ] [ 145 ] In open nesting sites, breeding success tends to be lower, since breeding begins late and the nest can easily be destroyed ...
The nesting sites can be vulnerable to predation by other cavity-nesting bird species, such as the house sparrow. [4] [5] These birds will search a number of swallow nests for the perfect place to make their own nest, destroying numerous eggs in the process. [4] Nests, especially those at the periphery of colonies, are vulnerable to snake ...
The monk parakeet and the cliff parakeet are the only two parrot species outside some members of the African lovebirds (Agapornis sp.) [17] that build nests. Monk and cliff parakeets are unique among even nesting parrots for their construction of large, external nests in trees or manmade structures instead of using tree cavities. [18]
Their eggs are unusual in having a large yolk, making up 50–70% of the egg weight. [5] The birds are best known for building massive nest mounds of decaying vegetation, which the male attends, adding or removing litter to regulate the internal heat while the eggs develop.
The nests are built at the junction of a vertical surface and an overhang, such as on house eaves, so that they may be strengthened by attachment to both planes. [9] Breeding birds return to Europe between April and May, and nest building starts between late March in North Africa and mid-June in Lapland. The nest is a neat closed convex cup ...