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Kontinye gade GRATIS ➞Li pran mwens Lè sa a, 1 minit Enskri Lè sa a, ou kapab jwi Sinema san limit & tit televizyon.
Ethologie der Graugans 1950 Aksè gratis san limit
The film gives a survey on innate behaviour patterns of the grey-lag goose. The first part shows reproductive behaviour. In the second part some behaviour patterns of gosling being imprinted on their human foster parent are shown: following reaction, separation of two flocks according to their imprinting, response to the alarm call and landing "by order" of the flying young.
Runtime: 13 minit
Kalite: HD
Lage: Jan 01, 1950
Peyi: Germany
Lang: No Language
