n. hunting for birds' eggs.
... a.specific sound , like awhistle , denoting theneed toescape Ifanest raider appears , thebird makes anintermittent .staccato sound , which serves asacall tobattle , gathering .nearby ... ... birds inorder todrive theattacker away from the.nests Thedistinction ofpredators islearned bybirds inthe.process ofdevelopment andispassed ontothenext .generation , can beused intheprocess ofdog training ... (Communication theory)
... place from the first , second egg or. after completion of laying The hatching bird can sit on the nest tightly or. throw the nest at the first sign of danger Hatching ... ... 's beak for food In this case , the most often favored is the coloring . of the beak of an adult bird ; in some birds .it changes at this time Adult birds most often react to the voice ... (Comparative Psychology and Zoopsychology)
... object (something round , without projections ., etc ) located outside the nest serves in this bird as a. key stimulus for the racking-in reaction as in the seagull .sitting on the nest in the described experiments of Skrebitsky ... ... movement of. the beak to the bird 's chest , which will stop .only when the object touches the bird sitting in the nest . If we put a cylinder perpendicular to the beak in. front of the edge ... (Comparative Psychology and Zoopsychology)
... , asthe.qualities ofapointer dog , untrained , become deaf , so theneed .tofly away forbirds , forsome reason nothaving .flown away foralong time , can belost : domestic ... ... ornithologist EVLukin Asaresult ofexperiments withpasserine birds , she proved .thatyoung females nesting forthefirst time intheir.lives build nests characteristic oftheirspecies Butthisstereotype can beviolated ... (Comparative Psychology and Zoopsychology)
... -.thisisnotacomplete list ofhunter 'sprofessional skills .During theperiods when theoffspring ofanimals andbirds .appear , thehunter ensures thatthereisnoexcessive noise .near thenests - he shoots , forexample ... (Professions and specialties)
... of a hungry gull chick to a. parent is that it bites a red spot on the.beak of a (yellow ) adult bird Tinbergen in his experiments used several layouts Only one layout exactly ... ... , the relation of the. gull to its eggs was investigated Researchers transferred eggs from one nest to another , replaced them . with eggs of other species of birds , other objects of.different ... (Comparative Psychology and Zoopsychology)
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