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A sea turtle clutch. A clutch of eggs is the group of eggs produced by birds, amphibians, or reptiles, often at a single time, particularly those laid in a nest. In birds, destruction of a clutch by predators (or removal by humans, for example the California condor breeding program) results in double-clutching. The technique is used to double ...
Great Black-backed Gull (Larus marinus), small clutch.Clutch size refers to the number of eggs laid in a single brood by a nesting pair of birds. The numbers laid by a particular species in a given location are usually well defined by evolutionary trade-offs with many factors involved, including resource availability and energetic constraints.
Bird ringing is the term used in the UK and in some other parts of Europe, while the term bird banding is more often used in the U.S. and Australia. [49] bird strike The impact of a bird or birds with an airplane in flight. [50] body down The layer of small, fluffy down feathers that lie underneath the outer contour feathers on a bird's body. [51]
Lack's principle, proposed by the British ornithologist David Lack in 1954, states that "the clutch size of each species of bird has been adapted by natural selection to correspond with the largest number of young for which the parents can, on average, provide enough food". [1]
Broodiness is the action or behavioral tendency to sit on a clutch of eggs to incubate them, often requiring the non-expression of many other behaviors including feeding and drinking. [1] Being broody has been defined as "Being in a state of readiness to brood eggs that is characterized by cessation of laying and by marked changes in behavior ...
The mean clutch size in three broad samples from several parts of the range was between 2.22 and 2.46. [42] [212] [224] In Minnesota, the mean clutch size was 2.68. [221] The eggs are pure white, slightly rough and not glossy, and oval in shape. [7]
But “Sue Bird: In the Clutch” feels like a sign of things to come, as much a harbinger as a send-off. Best of Variety. The Best Albums of the Decade. Sign up for Variety’s Newsletter.
A small bird, the tufted titmouse has a white front and gray upper body outlined with rust-colored flanks. Other characteristics include its black forehead and the tufted grey crest on its head. [5] In juveniles, the black forehead is greatly diminished such that it may be confused with the oak titmouse (although their ranges do not overlap ...