Publisher Summary The regular population cycles of boreal herbivores such as voles, hares
and birds of the grouse family (Tetraonidae) were an early source of wonder in ecology. All …

Rangeland ecosystems are changing worldwide with the abandonment of extensive
pastoralism practices and greater interest for species coexistence. However, the lack of …

Gyrfalcon predation on ptarmigan during the breeding season was studied in north‐east
Iceland 1981–97. The ptarmigan population went through a complete 10‐year cycle of …

Abstract Information on survival and habitat use of juvenile animals during the transition
period from parental independence to adulthood is sparse, yet survival during this period …

Males of many bird species acquire a conspicuous breeding plumage through molt. Male
rock ptarmigan (Lagopus mutus), however, become conspicuous in a unique way—as snow …

Understanding the effects of climate on avian life history traits is essential if we wish to
predict the demographic consequences of expected climatic changes. We investigated the …

Scottish Rock Ptarmigan (Lagopus mutus) showed unstable population dynamics, with
density‐dependent features differing between areas on rich and poor soils. The study was …

Populations of rock ptarmigan (Lagopus muta) in Iceland fluctuate in multiannual cycles with
peak numbers c. every 10 years. We studied the ptarmigan-parasite community and how …

I have studied the population ecology of the Gyrfalcon (Falco rusticolus) since 1981 on a
5,300-km2 study area in northeast Iceland harbouring 83 traditional Gyrfalcon territories …

We analysed harvest data for gyrfalcon Falco rusticolus and rock ptarmigan Lagopus mutus
from Iceland with respect to regularity in fluctuations of numbers. The gyrfalcon data …