I own no lord but Loxias
; him I serve And ne'er can stand enrolled as Creon's man.
Roeddwn i'n medru clywed 'tsip-tsip-tsip' y gylfingroes (Loxia
curvirostra; Crossbill) yn galw o'r pellter yn y coed ond fel arall, doedd 'na ddim smic.
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Some birds live in coniferous forests: dwarf owl (Glaucidium passerinum), titmouse, and mixed forests of beech: scissors (Loxia
curvivostrata), chaffinch (Fringila coelebis) and blackbird (Turdus Meru).
The ten species that contributed most to the drastic declines of the multispecies indices in 1994-1996 and 2007-2010 ranked by the strength of the impact 1994-1996 2007-2010 2007-2010 Farmland Farmland Woodland Sylvia nisoria Tringa totanus Parus palustris Numenius arquata Motacilla flava Loxia
curvirostra Anthus pratensis Oenanthe oenanthe Sitta europaea Jynx torquilla Crex crex Dryocopus martius Passer montanus Passer montanus Parus cristatus Oenanthe oenanthe Motacilla alba Dendrocopos major Corvus monedula Columba palumbus Oriolus oriolus Vanellus vanellus Delichon urbicum Dendrocopos minor Carduelis chloris Locustella naevia Nucifraga caryocatactes Crex crex Acrocephalus Parus montanus schoenobaenus
(1957) reported the red crossbill (Loxia
curvirostra) in Mexico from northern Baja California, Sinaloa, Nayarit, Jalisco, Michoacan, Guerrero, Chiapas, Chihuahua, Durango, Queretaro, Mexico, Distrito Federal, Morelos, San Luis Potosi, Puebla, Tamaulipas, and Veracruz.
leucophrys Sturnella neglecta 4 Xanthocephalus xanthocephalus Loxia
curvirostra 5 Carduelis (Spinus) pinus 1 unidentified raptoral bird bones 160 196 unidentified passerine bones total of identified bones.
This part is illustrated with numerous case studies, some of them can be considered convincing demonstrations of the coevolutionary process, such as the interaction of crossbills (Loxia
curvirostra L.) and pine cones (Pinus contorta Dougl.
purpureus (Gmelin), purple I O finch Coccothraustes vespertinus I R (Cooper), evening grosbeak Fringilla montifringilla Linnaeus, I R brambling Loxia
curvirostra Linnaeus, red N R crossbill L.
Benkman (1996) showed that variation in the rate of mandible crossing direction in Crossbills (Loxia
spp.) was a result of frequency-dependent selection.
The fauna of these forests consists of small animals, such as hares (Lepus), voles (subfamily Microtinae), and many species that eat conifer seeds, such as squirrels (family Sciuridae) and crossbills (Loxia
Benkman (1993) has shown that the diversity of Red Crossbills (Loxia
spp.) in northwestern North America can be exp lained by their differential abilities to utilize various conifer species as resources.