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Birds which build in trees generally have blue or greenish eggs, either spotted or unspotted, while birds that build in bushes or near or on the ground are likely to lay speckled eggs. The color of individual eggs is also genetically influenced, and appears to be inherited through the mother only, suggesting the gene responsible for ...
Oology (/ oʊ ˈ ɒ l ə dʒ i /; [1] also oölogy) is a branch of ornithology studying bird eggs, nests and breeding behaviour. The word is derived from the Greek oion, meaning egg. Oology can also refer to the hobby of collecting wild birds' eggs, sometimes called egg collecting, birdnesting or egging, which is now illegal in many ...
Wild birds impact many human activities, while domesticated birds are important sources of eggs, meat, feathers, and other products. Applied and economic ornithology aim to reduce the ill effects of problem birds and enhance gains from beneficial species. Red-billed queleas are a major agricultural pest in parts of Africa.
This list of birds of Great Britain comprises all bird species that have been recorded in a wild state in Great Britain. It follows the official British List, maintained by the British Ornithologists' Union (BOU). [ 1 ]
The great reed warblers' responses to the common cuckoo eggs varied: 66% accepted the egg(s); 12% ejected them; 20% abandoned the nests entirely; 2% buried the eggs. 28% of the cuckoo eggs were described as "almost perfect" in their mimesis of the host eggs, and the warblers rejected "poorly mimetic" cuckoo eggs more often.
British birds with their nests and eggs ; Author: Butler, Arthur G. (Arthur Gardiner), 1844-1925 ... Internet Archive identifier: cu31924000050066 https://archive.org ...
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 clutch is a single egg, usually pure white, sometimes with some reddish-brown spots that soon disappear. [18] The average size of the egg is 28 mm × 21 mm (1.10 in × 0.83 in), and it weighs 6.8 g (0.24 oz), of which 6% is shell. [39] If an egg is lost early enough, a replacement may be laid on rare occasions.