1. I stayed from 31st Oct. to 6th Dec. 1973 at Ramnagar, Jamu and Kashimir, north-western India, and investigated the wintering birds. The relationships between habitat structure and feeding behaviors of wintering birds were observed and discussed. 2. The study area is situated in the mountain rural village and has the artificial vegetations. The environment of birds may be divided into eight habitats, i.e., pine woods, deciduous woods, Leguminosae thin woods, bushy area, grassland, river, paddy field, and human habitation. Each habitat has a characteristic species composition and relative abundance corresponding to the structure of the habitat. 3. Of the wintering birds of Ramnagar, the commonest are the birds of Turdinae. Each species of this group is separated into the characteristic living spaces. There are three types, 1) ground attacking without watching posts, 2) ground attacking from watching posts on bush, and 3) flycatching to the space between trees from watching posts. In winter in Ramnagar, the living space of typical Muscicapinae is left vacant. But some species of the Turdinae enter into the lower space of the Muscicapinae's space. 4. There are three types of aggregation in birds; 1) mobbing assembly, 2) hunting party, and 3) chorus group. The mood of noise attracts some birds from their specific living space and promotes to the more available space exploitations. Such assemblies suggest the creation of the biological space by birds. 5. Conspicuous winter territories were observed. Especially, some species of the Turdinae have solitary territories, for example, the flycatching members and the ground attackers in openland. However, all observed cases are of intra-sexual territoriality. The males of Plumbeus Redstart are territorial, but the females are the non-territorial solitary. In the Blue-headed Redstart, both males and females are intra-sexually territorial, but had no inter-sexual territoriality.