The birds of Pasvik / E. I. Khlebosolov, O. A. Makarova, O. A. Khlebosolova [et al. ; English transl. Nikita Chernetsov]. - Ryazan : Golosgubernii, 2007. - 175 с. : ил., портр.

able for the features o f foraging techniques o f a particular species. In this section we review only the most general rules that refer to the specific structure o f passerine population in the natural ecosystems o f Pasvik. Mechanisms o f formation o f passer­ ine communities are discussed in more detail in Chapter 3. 2.4.5.1. Forest-dwelling passerines Passerines that inhabit the forest communities o f Pasvik are most diverse in their specific composition and form a high population density. The complex struc­ ture o f forest habitats and a broad range o f food objects allow them to forage by var­ ious methods. It creates a large number o f potential ecological niches for different taxonom ic and ecological groups o f birds. Among forest-dwelling passerines insectivorous and granivorous species may be distinguished. Insectivors can be divided into birds foraging in the crowns of trees and bushes and those foraging on the ground. All granivors belong to the group o f birds feeding in crows (Tab. 2.1). Table 2.1. Ecological groups of forest-dwelling passerines Insectivors Granivors Birds that feed in the Birds that feed in the crowns of trees and Ground-feeding birds crowns of trees and bushes bushes Willow Warbler Redwing Bullfinch Phylloscopus Irochilus Turdus iliacus Pyrrhula pyrrhula Chiffchaff Fieldfare Pine Grosbeak Phylloscopus collibita Turdus pilaris Pinicola enucleator Brambling Song Thrush Parrot Crossbill Fringilla montifringilla Turdus philomelos Loxia pityopsittacus Chaffinch Tree Pipit Bohemian Waxwing Fringilla coelebs Anthus trivialis Bombycilla garrulus Common Redpoll Great Grey Shrike Carduelisflammea Lanius excubitor Eurasian Redstart Bluethroat Phoenicurus phoenicurus Luscinia svecica Spotted Flycatcher Northern Wheatear Muscicapa striata Pied Flycatcher Muscicapa hypoieuca Siberian Tit Parus cinctus Willow Tit Parus montanus Great Tit Parus major Siberian Jay Perisoreus infaustus Oenanthe oenanthe 105