. The Canadian field-naturalist. 1974 Parker: Lemmings and Snowy Owls on Southampton Island 153. KILOMETERS 4 Q 4 Figure 2. The distribution of Snowy Owl nests at Salmon Pond in 1970. men, an adult L. trimucronatus caught on June 5, 1970, although adults of D. groenlandicus were observed copulating on several occasions in late June. A striking example of apparent extreme psychological stress was the immediate death of two D. groenlandicus when struck only on the forepaw by a snap trap. Both animals experienced violent shaking with legs extended, and were dead within 20-30 seconds. Lemmings cau
. The Canadian field-naturalist. 1974 Parker: Lemmings and Snowy Owls on Southampton Island 153. KILOMETERS 4 Q 4 Figure 2. The distribution of Snowy Owl nests at Salmon Pond in 1970. men, an adult L. trimucronatus caught on June 5, 1970, although adults of D. groenlandicus were observed copulating on several occasions in late June. A striking example of apparent extreme psychological stress was the immediate death of two D. groenlandicus when struck only on the forepaw by a snap trap. Both animals experienced violent shaking with legs extended, and were dead within 20-30 seconds. Lemmings caught in the open often "attacked," emitting screams and dancing forward on hind legs. No extensive movement or emigration of lemmings was observed. Lemmings wandering over the tundra and on the lake ice were apparently without burrows or territories because of the reced- ing snow cover. All lemmings collected were infected with ec- toparasites. Specimens collected and identified ^erc Laelaps alaskensis, Hirstionyssus isabellinus, Haemogamasus alaskensis, and Parasitus sp. The most important predator on the lemmings in 1970 was the Snowy Owl (Nyctea scandiaca), al- though all three species of jaeger (Stercorarius pomarinus, S. parasiticus, and S. longicaudus) were present and breeding on the island (Parker and Ross 1973) and also relied extensively on the lem- mings for Please note that these images are extracted from scanned page images that may have been digitally enhanced for readability - coloration and appearance of these illustrations may not perfectly resemble the original Ottawa Field-Naturalists' Club. Ottawa, Ottawa Field-Naturalists' Club
Size: 1531px × 1631px
Photo credit: © Book Worm / Alamy / Afripics
License: Licensed
Model Released: No
Keywords: ., bookauthorottawafieldnaturalistsclub, bookcentury1900, bookcolle
