Search results
Results from the WOW.Com Content Network
The House finch (Haemorhous mexicanus) is a North American bird in the finch family. It is native to Mexico and southwestern United States , but has since been introduced to the eastern part of North America and Hawaii; it is now found year-round in all parts of the United States and most of Mexico, with some residing near the border of Canada .
Birds of a pair copulate frequently until the female is laying eggs, and the male mounts the female repeatedly each time a pair mates. [132] The house sparrow is monogamous, and typically mates for life, but birds from pairs often engage in extra-pair copulations, so about 15% of house sparrow fledglings are unrelated to their mother's mate. [135]
A last example is in the house finch where they found that preen waxes on feathers acted as cosmetics and that the waxes increased the signal content of feather traits. [26] The signal content correlated to the condition of the individual and increased the signaling value to mates, and therefore affected mate choice, implying that cosmetic ...
The true finches are small to medium-sized passerine birds in the family Fringillidae. Finches generally have stout conical bills adapted for eating seeds and nuts and often have colourful plumage. They occupy a great range of habitats where they are usually resident and do not migrate. They have a worldwide native distribution except for ...
Swans are the largest extant members of the waterfowl family Anatidae and are among the largest flying birds. The largest living species, including the mute swan, trumpeter swan, and whooper swan, can reach a length of over 1.5 m (59 in) and weigh over 15 kg (33 lb). Their wingspans can be over 3.1 m (10 ft). [ 21]
Mate choice is a major component of sexual selection, another being intrasexual selection. Ideas on sexual selection were first introduced in 1871, by Charles Darwin, then expanded on by Ronald Fisher in 1915. At present, there are five sub mechanisms that explain how mate choice has evolved over time.
The American goldfinch ( Spinus tristis) is a small North American bird in the finch family. It is migratory, ranging from mid- Alberta to North Carolina during the breeding season, and from just south of the Canada–United States border to Mexico during the winter. The only finch in its subfamily to undergo a complete molt, the American ...
The show "Friends" got a lot right at the time—from the trials and tribulations of making adult friends to dating in New York City to growing up in your 20s. But, there's one thing the show got ...