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.

s ^0,59 H - 0 , 3 3 ^ D U 4 Figure 3.22. Succession and frequency o f foraging manoeuvres used by Redwings: H — hop; P —pick; Du —digging food from the ground; To — turning over dry leaves; S — searching for prey. N is the num ber o f suc­ cessions o f foraging manoeuvres. N umbers show the frequency o f foraging manoeuvres after the preceding ones (Baranovsky et al., in press). Figure 3.23. Succession and frequency o f foraging manoeuvres used by Fieldfares: H — hop; P - pick; Du — digging food from the ground; S - searching for prey. N is the n um ­ ber o f successions o f foraging manoeuvres. Numbers show the frequency o f foraging manoeuvres after the preceding ones (Baranovsky et al., in press). looks around and makes stops, but takes large prey items (Baranovsky et al., in press). Fieldfares rarely occur in deep forest and prefer to remain on the edges, in clearings, along the banks (Fig. 3.21). For this strategy the decisive factor is the presence o f herbaceous vegetation in small dense tussocks, and lack o f lichens in the ground layer. Such habitats are usually available on the dry well drained p a tch ­ es o f fertile soil or in anthropogenic landscape. Fieldfares, like Redwings, take food from the ground. However, this thrush mainly feeds in open places with herbs in the ground layer and takes food from rel­ atively dense soil or from turf formed by the rootage o f herbs. When foraging, Fieldfares make comparatively short series o f hops often interrupted by picks. The birds make many shallow picks hardly penetrating the surface and take relatively small food objects (Fig. 3.23, Baranovsky et al., in press). Song Thrush prefers to settle in dry birch forests or mixed pine and birch stands with a large proportion o f birch (Fig. 3.21). The presence o f birch tree waste and a well-developed ground layer with untouched surface is essential for this species (Baranovsky et al., in press). Like the two other species, Song Thrushes, when for- То-°’оГ ^ ^0,60^ p - 0 , 4 0 - P - 1 H ^o,63 S - 0 , 33 ^ H' P 0,40 '0 ,2 5 ^ „0,2Г 0,14 ,0 ,0 4 / S 0,61 P ^ 0 , 2 5 - P 0,14 \ H N = 546 0,60 H - 0 , 4 0 — Du H - 0 , 7 0 — s „ 0,30 p / 0,20 N = 752 142