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Nesting mossy-nest swiftlets. The nest of many species is glued to a vertical surface with saliva, and the genus Aerodramus use only that substance, which is the basis for bird's nest soup. Other swifts select holes and small cavities in walls. [15] The eggs hatch after 19 to 23 days, and the young leave the nest after a further six to eight weeks.
Hummingbird females build a nest resembling a small cup about 1.5 inches (3.8 cm) in diameter, commonly attached to a tree branch using spider webs, lichens, moss, and loose strings of plant fibers (image). [14] [15] Typically, two pea-shaped white eggs (image) – the smallest of any bird – are incubated over 2–3 weeks in breeding season.
The lesser violetear is roughly medium-sized by hummingbird standards. It averages around 9.7 to 12 cm (3.8 to 4.7 in) in total length. Its bill is black and mostly straight with only a slight downward curve and measures from 1.8 to 2.5 cm (0.71 to 0.98 in).
The bee hummingbird's breeding season is March–June, with the female laying one or two eggs. [17] Using strands of cobwebs, bark, and lichen, female bee hummingbirds build a cup-shaped nest about 2.5 cm (1 in) in diameter and 3–5 m (9.8–16.4 ft) off the ground. The nest is lined with a layer of soft plant wool. [18]
The broad-billed hummingbird is a small-sized hummingbird at about 8–10 cm (3.1–3.9 in) long. [3] It weighs only 3–4 grams, with the male weighing slightly more than the female. [3] The wingspan of the hummingbird is about 13 cm (5.1 in). [15] It has a long, bright reddish coloured bill that has a black tip. [16]
The swift's wingbeats are deep and quick, and the swift glides for longer. The swallow's flight is more fluttering, and it presses its wings further to the rear during beats. Although sometimes difficult to discern against a bright sky, the underside of a swift, with the exception of the white spot under its chin, is entirely dark brown.
Which hummingbirds have you seen in Oklahoma so far this spring? Plus, what to know about attracting hummingbirds to your garden.
There is little known of the giant hummingbird's breeding behaviour, but some generalisations can be inferred from other hummingbird species. Hummingbird males tend to have polygynous, occasionally promiscuous, behaviours, [17] and no involvement after copulation. [27] The female builds the nest and lays a clutch of two eggs during the summer. [28]