Head cocking in galagos
Article Abstract:
Head cocking in galagos occurs as a response to visual stimuli and is used in the location of prey, for it helps in auditory perception and provides visual stimulus. Head cocking, a social signal, involves rotating the head around its rostrocaudal axis while looking in a fixed direction. It is done usually to an angle of 45 degrees to 90 degrees, and is characterized by fast saccadic movements of the head. Head cocking seemed to occur more in adult females than males, and in infants more than in adults.
Publication Name: Animal Behaviour
Subject: Zoology and wildlife conservation
ISSN: 0003-3472
Year: 1993
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Hand preferences and other lateral biases in rehabilitated orang-utans, Pongo pygmaeus pygmaeus
Article Abstract:
Forty-three free-ranging, rehabilitated orangutans were observed in rehabilitation centers in the Malaysian islands of Sarawak and Sabah to determine their hand preferences. Results indicate a strong group bias for the use of the left hand in touching the face and to a lesser degree, for touching the head and body. Young orangutans seemed to have a lesser degree of manipulative ability. It is possible that rehabilitated orangutans pick up hand preferences by observing humans.
Publication Name: Animal Behaviour
Subject: Zoology and wildlife conservation
ISSN: 0003-3472
Year: 1996
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Footedness in birds
Article Abstract:
A study exploring the footedness in birds is presented. Previous theory postulates the development of lateral preference in the use of limbs due to food manipulation. Results from an experiment, however, reveal an equal use of the right or left foot in manipulation tasks in adult Budgerigars. Also, chicksof Gallus domesticus showed a shift from no bias to right footedness. This may be caused by a shift in hemispheric dominance.
Publication Name: Animal Behaviour
Subject: Zoology and wildlife conservation
ISSN: 0003-3472
Year: 1993
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