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The resin may deter predators or competitors (the resident birds avoid the resin by diving straight through the entrance hole). [58] The white-breasted nuthatch smears blister beetles around the entrance to its nest, and it has been suggested that the unpleasant smell from the crushed insects deters squirrels , its chief competitor for natural ...
The entry holes are usually oblong and six to nine inches (152–228 mm) [3] that permits a single bird to enter with space for a safe landing and passage to the interior whilst at the same time excluding larger predators. [1] Owl holes without landing platforms had grooves or rough surfaces beneath the hole to aid grip.
The nest is an underground horizontal oval chamber lined with shredded bark, linked by a tunnel 0.5 to 1.5 metres (1 ft 8 in to 4 ft 11 in) long to a hole in the side of a riverbank or slope in a shaded location. [18] The chamber is generally higher than the entrance tunnel, presumably to avoid flooding. [4]
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 ...
The American dipper's nest is a globe-shaped structure with a side entrance, close to water, on a rock ledge, river bank, behind a waterfall or under a bridge. The normal clutch is 2–4 white eggs, incubated solely by the female, which hatch after about 15–17 days, with another 20–25 days to fledging. The male helps to feed the young.
These intricately carved wooden structures feature a large arch with a slatted door, which is meant to admit drivers of carriages and wagons (although today the visitors are probably driving cars and trucks), and a smaller arch with a similar door for pedestrians. Across the top of the gate is a dovecote with 6-12 or more pigeonholes and a roof ...
The nest is a pouch made of cobwebs, thin strips of vegetation, lichens and bark. The entrance hole on the side is often shaded by an overhanging projection. The nest is built almost entirely by the female. The nest material is not woven and most of it is held together by cobwebs. About five to ten days may be taken in the building of the nest.
Birds fly in and leave again constantly, making significant noise. Colonies can contain as many as 150 nests, but eight to a hundred nests in a single tree are usual. [10] A village weaver's nest is 14–17 cm (5.5–6.7 in) long and 11–13 cm (4.3–5.1 in) high. The entrance is mostly extended into a tube of 4–8 cm (1.6–3.1 in) long.