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addled eggs Also, wind eggs; hypanema. [5] Eggs that are not viable and will not hatch. [6] See related: overbrooding. afterfeather Any structure projecting from the shaft of the feather at the rim of the superior umbilicus (at the base of the vanes), but typically a small area of downy barbs growing in rows or as tufts.
Like many precocial hatchlings, domestic chickens are already covered with a coat of downy feathers when they hatch. The word down comes from the Old Norse word dúnn, which had the same meaning as its modern equivalent. [1] The down feather is considered to be the most "straightforward" of all feather types. [2]
Another consequence of climate change is the direct threat that sea level fluctuations pose to the nesting sites of the Galápagos penguins. Rising sea levels, attributed to the melting of polar ice caps, can inundate low-lying areas where the penguins breed. The loss of nesting sites exacerbates the challenges faced by the species, reducing ...
The study of feathers is called plumology (or plumage science). [6] [7] People use feathers in many ways that are practical, cultural, and religious. Feathers are both soft and excellent at trapping heat; thus, they are sometimes used in high-class bedding, especially pillows, blankets, and mattresses.
Food chain in a Swedish lake. Osprey feed on northern pike, which in turn feed on perch which eat bleak which eat crustaceans.. A food chain is a linear network of links in a food web, often starting with an autotroph (such as grass or algae), also called a producer, and typically ending at an apex predator (such as grizzly bears or killer whales), detritivore (such as earthworms and woodlice ...
The sexes did not differ in color; juvenile birds are unknown but probably had duller bare parts and some greyish-buff fringes to the feathers. The coloration of downy young is likewise unknown; these are generally brownish-grey above with dark striping to provide camouflage against predators such as gulls; considering the dark lava rock ...
Sandgrouse is the common name for Pteroclidae / t ɛ ˈ r ɒ k l ɪ d iː /, a family of sixteen species of bird, members of the order Pterocliformes / ˌ t ɛ r ə k l ɪ f ɔːr m iː z /.They are traditionally placed in two genera.
The crowned eagle may be found from an altitude of sea-level to at least 3,000 m (9,840 ft). Owing to lack of current suitable habitat, the eagle's range is often somewhat discontinuous. [ 9 ] In the Democratic Republic of the Congo , the crowned eagle has been confirmed to survive at relatively high densities in protected areas that maintain ...