I. Forest bird communities: 1. Introduction. 2. Species composition of birds 3. Species--Abundance relations. 4. Seasonal changes of the community. 5. Vertical stratification of the community. 6. Habitat utilisation. II. Wetland bird communities: 7. Species composition of wetland birds. 8. Species abundance relations. 9. Seasonal changes of the bird community. 10. Habitat utilisation of wetland birds. 11. Food and feeding of selected species. 12. Summary and conclusion.
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