MacLean 1969 Lemmus trimucronatus June the area exposed to date shows little sign and no nests. there are no owls or jaegers in the area. I think we had better give up our ideas about a high. 10 June the melt is revealing low polygon troughs with more sign, including a few nests, in Britton's Area. 12 June of 4 nests examined in 5, 1 had been predated. that had the cranium and intact abdomen of a ♀ Lemmus - pregnant, with 20mm. embryos - 4 in left horn, 2 in right horn. also found a ♂ Lemmus dead - apparently trapped in a runway by collapsing slush. 13 June Began systematic lemming nest census today in Britton's Area. Bee nest record on separate sheet. the level of predation was high.