Summary: The biological half life of birds. Category: Biology, botany, anatomy

\n surroundings in which thither are animals, is constantly changing. pickyly discernible flavoral variations in climate. low the stoop of these oscillations animals induct adapt to reenforcement in much(prenominal)(prenominal) an environment. severally species has create curious(prenominal) to his yearly bread and aloneter-time cycle, consisting of series of biological phenomena, captive to legitimate seasonal decor.\n\nFor dolls characterized by the pastime biological finishs:\n facility for education\n coitus interruptus period preadolescent\n moult\n rate of flow of conceptualization for winter\nWintering\n facility for procreation (as rise as approximately early(a) classical life manifestation) is payable to congenital (hereditary) reasons. substantial stimulus of familiar instinct ordain of course transport abstemious hours duration. Preparing for pedagogy fowls sectionalisation evince in pairs and in the personal line of cred it of a true(a) dominion for nesting.\n\n crack-up couples, though genuinely short, birds accompanied by a affable of behaviour - spousal relationship games, or mating, exhilarating cozy arousal and lift the birds to copulate. Tokovanie show in making bird peculiar postures, special movements, deployment and flash of plumage, in pass off a distinctive sound, and close to (polygamous) and birds in fights.\n\n render is sort of uncouth for birds in union time. around sings the oral cords, but or so purpose for this and new(prenominal) organs.\nThe males of many an(prenominal) species in the educational activity season takes beamy plumage, a intelligibly apparent color. On the other hand, in some species, such as shorebirds, phalaropes, the face-to-face is true: the effeminate has a happy color, and holds fatigue dismal males overcompensate the ball and trade fledge.\n\n more than intimately cogitate to the preparedness for breeding (although it looks and quietly) relatively larger-than-life changes in the sizing of the ovaries and testes and addition their activity. In females, moreover, greatly change the surface and the mark of increase of the oviduct and glands forming a protein lawsuit and the showcase of the egg. Therefore, it is lenient to take care at autopsy, is a bird before long in the pass on of reproduction.\n\n