SAM Derbeek 1966. Nyctea scandica 27 Aug. Bob lewellen claimed to have seen 3 birds in the Cake Eater Area. 28 Aug. I checked the area today and saw no owls. 2 Sept. Bob lewellen claimed to have seen one bird in the early afternoon in the same area as above. 3 Sept The Pomarine Jaeger has been shown to be the main predator of lemmings, breeding in greater densities in peak years as compared to low years. It seems strange then that in the early part of the arctic summer this year, a low year for lemmings, we saw Pomarines quite frequently, while Snowy Owls were absent. Do owls have a better mechanism to measure the presence of lemming or where the Pomarines merely wandering immature?