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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.
The northern cardinal (Cardinalis cardinalis), known colloquially as the common cardinal, red cardinal, or just cardinal, is a bird in the genus Cardinalis.It can be found in southeastern Canada, through the eastern United States from Maine to Minnesota to Texas, New Mexico, southern Arizona, southern California and south through Mexico, Belize, and Guatemala.
All bird eggs contain the following components: [1] The embryo is the immature developing chick; The amnion is a membrane that initially covers the embryo and eventually fills with amniotic fluid, provides the embryo with protection against shock from movement
Their clutch size can vary, usually between 3–7. [5] Eggs are usually a tan color with darker speckles throughout to allow for camouflage. [8] The female bird primarily incubates for 12–14 days. [5] The chicks leave the nest only 2 weeks after hatching. [5] Nests are not built in isolation, but in colonies of up to 30 pairs. [5]
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]
The song "Auld Lang Syne" comes from a Robert Burns poem. Burns was the national poet of Scotland and wrote the poem in 1788, but it wasn't published until 1799—three years after his death.
The tufted titmouse (Baeolophus bicolor) is a small songbird from North America, a species in the tit and chickadee family ().The black-crested titmouse, found from central and southern Texas southward, [2] was included as a subspecies but now is considered a separate species, Baeolophus atricristatus.