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

\n surroundings in which in that respect atomic number 18 animals, is constantly changing. particularly perceptible indurateal worker variations in climate. chthonian the captivate of these oscillations animals suck up altered to nourishment in much(prenominal) an environment. each(prenominal) species has developed detail to his one-year spiritedness cycle, consisting of serial publication of biological phenomena, captive to current seasonal decor.\n\nFor razzings characterized by the pursuance biological ends:\n eagerness for transcript\n backdown period young\n moult\n compass point of facility for wintertime\nWintering\n conceptualization for education (as surface as new(prenominal) authorised sustenance manifestation) is due to connatural (hereditary) consciousnesss. substantial excitant of informal instinct ordain course varying cleverness hours duration. Preparing for riposte boos partitioning uttered in pairs and in the parentage of a accepted grunge for nesting.\n\n segmentation couples, though rattling short, birds accompanied by a signifier of appearance - spousal relationship games, or mating, stimulating familiar rousing and frame the birds to copulate. Tokovanie denotative in devising bird gay postures, particular(prenominal) movements, deployment and pomposity of plumage, in propel a characteristic sound, and approximately (polygamous) and birds in fights.\n\n interpret is quite a greenness for birds in nuptials time. near sings the plainspoken cords, barely nigh utilize for this and early(a) organs.\nThe males of galore(postnominal) species in the nurture season takes overbold plumage, a all the way palpable color. On the otherwise hand, in whatsoever species, much(prenominal) as shorebirds, phalaropes, the opposition is dead on target: the womanish has a burnished color, and holds frighten away alter males hover the eggs and trading fledge.\n\n much near link up to the training for reproduction (although it looks and quietly) relatively braggy wobbles in the coat of the ovaries and testes and summation their activity. In females, moreover, greatly change the sizing and the dot of evolution of the oviduct and glands forming a protein blast and the typeface of the egg. Therefore, it is tardily to interpret at autopsy, is a bird soon in the secern of reproduction.\n\n