This study describes the foraging ecology of members of the families Paridae and Aegithalidae in a riparian oak woodland, a mixed-coniferous forest, and a deciduous woodland. Results for the mountain chickadee (Parus gambeli), bushtit (Psaltriparus minimus), plain titmouse (Parus inornatus), blue tit (P. caeruteus), great tit (P. major), and marsh tit (P. patustris) indicate that each species possesses a unique foraging strategy. Differences were particularly apparent in foraging height, tree species use, and foraging substrate. The foraging behaviors of these species provide illustrations of habitat partitioning.
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