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Allegheny wood rats (Neotoma floridana magister) are occasionally found beyond the light penetration zone in caves. The means of orientation used by cave-trapped rats were studied using a radial maze and double-platform jumping tasks. The effects of various sensory manipulations upon their...
Pigeons reared in deflector cages show on release a very pronounced bias of their mean vanishing bearings in the predicted direction, confirming the results of Baldaccini et al. (1975a). The angle of deviation though is only about half the angle of actual wind deflection in the cages. The...
The mating system and social behavior of the tree-dwelling lizard Liolaemus tenuis (Iguanidae) were studied in two parks in Santiago, Chile, and in one in San Felipe, during the breeding seasons of 1976 and 1977.
It was found that the degree of polygyny increases with tree diameter....
The sexual behaviour of a chimpanzee community in the Gombe National Park, Tanzania, was studied intensively for 16 months. Additional information came from 15 years of demographic and behavioural data accumulated by Jane Goodall and members of the Gombe Stream Research Centre.
Foraging by a social wren, Campylorhynchus nuchalis (Troglodytidae), in a tropical savanna habitat is not enhanced by aggregation. Data for marked individuals show that solitary foraging results in a higher capture rate than foraging near others. We find no evidence of imitative foraging, as...
Ranging behavior in a nonmigratory population of white-crowned sparrows Zonotrichia leucophrys nuttalli residing in the coastal scrub habitat of central California was studied by trapping and recapture. Over 12,000 captures of more than 1,700 individuals were analyzed. In their first...
Acorn woodpeckers typically live in permanent social groups in which most adults help to incubate and feed the young of a single nest. The selective basis of communal breeding in this species is examined.
At the study area in New Mexico, most juveniles did not remain on their natal...
Seven isolated G. petersii resting in their daytime hiding-places were stimulated via a dipole model (Fig. 1a) with previously tape-recorded electric organ discharge (EOD) patterns in an attempt to determine whether G. petersii distinguishes two different intraspecific EOD patterns, rest...
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