Northern Harrier predation on Willow Ptarmigan.-There are few reports of Northern. Harriers (Circus cyaneus) killing ptarmigan, although Braun and Rogers...
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www.jstor.org/stable/4162314
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In the winter, the willow ptarmigan often flies into snow banks and nestles in the snow to sleep. By flying into the banks instead of walking, they don't leave tracks for predators to follow!
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www.nhptv.org/natureworks/willowptarmagin.htm
www.nhptv.org/natureworks/willowptarmagin.htm
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The Willow Ptarmigan is found only in the colder regions of North America. During particularly chilly winters they do migrate further south than normal and can be seen in locations throughout Canada where they normally are By flying into the banks instead of walking, they don't leave tracks for predators to follow.
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www.kidzone.ws/animals/birds/willow_ptarmigan.htm
www.kidzone.ws/animals/birds/willow_ptarmigan.htm
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Cause of death in willow ptarmigan Lagopus l. lagopus chicks and the effect of intensive, local predator control on chick production...
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www.ingentaconnect.com/content/nkv/wb/2009/00000015/000...
www.ingentaconnect.com/content/nkv/wb/2009/00000015/00000001/art00005
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A method of determining the sex from remains (only wings, primaries and/or rectrices available) of adult and yearling Willow Ptarmigan that were killed by predators or hunters is described. In this study we attempted to separate between male and female Willow Ptarmigan (L. l. alexandrae) in northwestern British...
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elibrary.unm.edu/sora/JFO/v064n01/p0011-p0017.html
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Here we document Northern Harrier predation on Willow Ptarmigan (L. l. albus) and detail the responses of the prey to presence of harriers during the breeding season in northern Canada. We suggest that harriers may be more important predators on ptarmigan, especially hens with nests, than has been reported previously.
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elibrary.unm.edu/sora/Wilson/v098n04/p0597-p0600.html
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The white winter plumage of willow ptarmigan helps hide them from predators. be fending off a totally different sort of predator: other male ptarmigan.
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www.taiga.net/yourYukon/col120.html
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Predator control and willow ptarmigan chick production .... Willow ptarmigan chicks are exposed to a wide range of predators, some hunting mainly by sight,
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www.bioone.org/doi/pdf/10.2981/07-073
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This species has developed a variety of behavioral and physiological adaptations for living in extreme northern environments, where temperatures and light levels vary dramatically and predators abound: Willow Ptarmigan are usually monogamous, but 5–9% of males may be polygynous. Unusual for grouse,
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bna.birds.cornell.edu/forward/account/Willow_Ptarmigan
bna.birds.cornell.edu/forward/account/Willow_Ptarmigan
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