摘要: Bird species diversity was linearly correlated with foliage height and curvilinearly total percent vegetation cover. The addition of trees in a vegetational series has disproportionate effect on the species, primarily by rather than expansion guilds. No basic relationship species-packing within guilds is associated bill or body size except frequently two-member Estimated abundance biomass birds does not appear to be related productivity habitats, contrast reports from literature. Similarity bird composition similarity distribution, when like study areas are compared. Avifaunas grasslands generally differed more among themselves did those forests. overlaps were cor- only for part variational range two- three- layered little if at all grasslands. Width "habitat-niche" numerical dominance, taxonomic ecological categories. Because many these results do coincide previous attempts general- ization, great care such seems strongly indicated. Studies should made meticulously delineated subcommunities, resource measurement, reproductive success, as well events nonbreeding season.