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The cassowary breeding season starts in May to June. Females lay three to eight large, bright green or pale green-blue eggs in each clutch into a heap of leaf litter prepared by the male. [26] The eggs measure about 9 by 14 cm (3.5 by 5.5 in) – only ostrich and emu eggs are larger.
The blue egg of the Araucana was at this time thought to be unique among chickens. In 1933 Reginald Punnett showed that the blue egg ("oocyan") gene in chickens is dominant with respect to white, while in combination with genes for brown eggs, various shades of green and olive are produced.
Eggs are 14–18 mm (0.55–0.71 in) long and 10.7–13.5 mm (0.42–0.53 in) wide. Egg size appears to depend mostly on the size of individual females and secondarily on habitat, with smaller eggs found at higher altitudes. The clutch's total weight can be 1.5 times as heavy as the female bird. [22] Juvenile in Pimlico, London
The blue-footed booby (Sula nebouxii) is a marine bird native to subtropical and tropical regions of the eastern Pacific Ocean. It is one of six species of the genus Sula – known as boobies. It is easily recognizable by its distinctive bright blue feet, which is a sexually selected trait and a product of their diet.
The three to five eggs are incubated by both adults for 21 to 25 days before hatching. They are oval in shape and have a pale, non-glossy, blue-green shell colour. The young birds are covered in white down feathers, are cared for by both parents and fledge after 40 to 45 days. [8] [9]
[29] [30] Small for the size of the bird, they are typically pale blue-green, with close specks and spots of olive brown, but show much variation in ground and marking. [31] The eggs are incubated for 21–22 days by the female, who is fed on the nest by the male. [32] The chicks are altricial, hatching nearly naked with closed eyes.
The nest is an open cup in dense shrub or a tree into which the female lays four to six glossy deep blue-green eggs that hatch in about ten days. Adults and chicks feed mainly on insects, typically picked off the ground, but sometimes taken from vegetation. In winter, the accentors may also consume seeds or feed near human habitation.
The blue-faced honeyeater was first described by ornithologist John Latham in his 1801 work, Supplementum Indicis Ornithologici, sive Systematis Ornithologiae.However, he described it as three separate species, seemingly not knowing it was the same bird in each case: the blue-eared grackle (Gracula cyanotis), the blue-cheeked bee-eater (Merops cyanops), and the blue-cheeked thrush (Turdus ...