A prominent invasion of the Snowy Owl (Nyctea scandiaca
) to Estonia was detected in winter 1895/96 (Leibak et al., 1994), and that of the Tengmalm's Owl (Aegolius funereus) to Latvia in winter 1901/02 (Viksne, 1983).
The health of Arctic fox (Alopex lagopus) and snowy owl (Nyctea scandiaca
) populations depends on the abundance of lemmings.
Scientists identify the snowy owl as Nyctea scandiaca
, a name that translates prosaically as the "nocturned bird of Scandinavia." It is the world's only large, white owl.
longicaudus, Larus hyperboreus, Nyctea scandiaca
, and Alopex lagopus) is a resident rodent specialist.
Using a remote movie camera, Custer (1973) identified a snowy owl (Nyctea scandiaca
) depredating Lapland longspur nestlings at a site near Barrow.
Snowy owl harfang des neiges Nyctea scandiaca
18 Short-eared owl hibou des marais Asio flammeus 29 Common raven grand corbeau Corvus corax 26 Horned lark alouette hausse- Eremophila 82 col alpestris American pipit pipit d'Amerique Anthus rubescens 100 American tree bruant hudsonien Spizella arborea 88 sparrow Savannah sparrow bruant des pres Passerculus 85 sandwichensis White-crowned bruant a couronne Zontrichia 53 sparrow blanche leucophrys Lapland longspur bruant lapon Calcarius 100 lapponicus Snow bunting bruant des neiges Plectrophenax 26 nivalis Common/hoary sizerin flamme/ Carduelis flammea/ 32 redpoll blanchatre hornemanni TABLE 2.
Snowy owl, Nyctea scandiaca
. In: Poole, A., Stettenheim, P., and Gill, F., eds.
Most colonies (36 of 45) were located on small islands (mean = 248 [m.sup.2]) in inland lakes or large ponds, and the remaining colonies (n = 9) were located on the mainland near active snowy owl (Nyctea scandiaca
The snowy owl (Nyctea scandiaca
) is an irregular breeder, reproducing only when lemming numbers are high, as in 1996.
Associated with these phenomena are the cyclic dynamics of predators such as arctic foxes (Alopex lagopus) and snowy owls (Nyctea scandiaca
) (Portenko, 1972; Summers et al., 1998).
On a observe le grand corbeau Corvus corax et le harfang des neiges Nyctea scandiaca
sur la lisiere de la glace de rive.
On Bathurst Island, potential predators of brant or their eggs and chicks include the arctic wolf (Canis lupus arctos), arctic fox (Alopex lagopus), polar bear (Ursus maritimus), snowy owl (Nyctea scandiaca
), parasitic jaeger (Stercorarius parasiticus), long-tailed jaeger (S.