Burung kicau (Songbirds)
White-winged Crossbill
Loxia leucoptera
- tidak umum
- 40 km/h
- Risiko rendah
Breeds whenever spruce cones ripen, even in January. Doesn't believe in seasons.
- Populasi
- ~79 million mature individuals globally (~40 million in USA/Canada; 204,000–613,000 in Europe); overall stable trend
- Habitat
- Boreal and montane coniferous forest, especially spruce, tamarack/larch, and fir stands; also ornamental conifers in parks/cemeteries/campuses and feeders during winter irruptions
- Fakta menarik
- A single White-winged Crossbill can extract and eat up to 3,000 conifer seeds in one day, prying open cone scales with its uniquely crossed bill.
- Sebaran
- Circumpolar boreal zone: breeds across Alaska, Canada, and the northern conterminous US, and across northern Europe/Scandinavia and Russia to Siberia; a highly irruptive nomad that periodically wanders far south of its core range in food-shortage years
- Makanan
- Conifer seed specialist — pries seeds from spruce, tamarack/larch, fir, hemlock, pine and other cone scales with its crossed bill (up to ~3,000 seeds/day); supplements with insects (spruce budworm, coneworm) in summer, rowan berries, and grit
- Ukuran
- 0,16 m
- Bentang sayap
- 0,27 m
- Masa hidup
- 4 tahun
