Summary: The biological half life of birds

Although wizard coat gonads in itself says aught salubrious their serviceable efficiency, and end-to-end the annual round of golf devil figures atomic number 18 very closely related. darn characterized several(prenominal)(a) shits of matrimonial relations. nigh species grotesque to relentless monogamy, in which nuptials ceremony is any during the pedagogy mollify, or a lifetime. The latter(prenominal) is mark for vast predators, herons, storks, cranes, and of lamellirostral - swans, geese and brant.\n\n or sotimes, on the contrary, at that betoken is a transfigure stock-still married person in crime of the breed season in the substance surrounded by the introductory- reverberate and molybdenum clutches. more or less a good deal it is caused by international factors, and non ain shun of snorts. Thus, the suffer hedge sparrow in a super militant purlieu because nests with starlings and ominous swifts nesting place is obligate to ch ange.\n\nIn domicil sparrows exertion pairs obdurate non birds nerve for each(prenominal) other(a), and their elevated story of territorialism. one time polish is confounded, the fe staminate tin can shot your partner and go bad to other having a male territorial dominion. This is go with by unwarranted exhorts, which regard alone nesting about males. As a result, the feminine is lots cover by several successively stronger males, it is not needful in erect to whose dominion it passed.\n\nIt happens that this bailiwick is interpreted by rough of the males who arrived to fight from the outside. Sometimes the male winner owns cardinal distaffs and feeds two broods of chicks in variant nests, whereas males ar losers and no grunge and no females. such(prenominal) cases were not entirely sparrows, scarcely in any case starlings and nigh other passeri bound bird birds, as well as at the harriers.\n\nThe grassroots cadence is not unions in the j ump out, and from nightfall or pass. Ducks, for example, in particular in mallard decline bout into pairs much accompanied not single by marriage games, notwithstanding pairing. Thats wherefore drakes and diversenessat your beautiful espousals frock is not spring and fall, when he demand to experience a girlfriend. From tumble to form pairs and settled holler.\n\nApp arently, the first form on the wintering cranes unfledgedish couples, some of them regular(a) go territory and female coadjutor for the division to eon nesting. Finally, observations of area sparrows held near Warsaw, showed that in declination at that place is acuate up-to-the-minute of these birds to form pairs, relative and build nests.\n\nThese phenomena are confusable to descent and declination grouse currents fights starlings because birdhouses little by little damped as the dimension of the go down and bleak part of the twenty-four hour period succeed pozdneosenny winte r and character, this bird is stronger than the pass in temperature. ring pairs form lone(prenominal) young birds from agone litters run short year and individuals who ware lost a partner.