Maclean 1967 C. alpina [11 June] population is simply not dense enough to generate much display. 12 June Visited the Vott-Village Ridge region - but recently exposed. Very poor! Found a 1 egg alpina nest - peculiar - I saw a bird that looked as if it might be off a nest - followed it onto the nest. When flushed it gave a trill - i.e. the o7 - but only 1 egg in the nest. It is curious that the o7 was so attentive to a 1 egg nest. Don't see the f. A bird, probably the o7, later displayed very well, but otherwise birds are widely spaced and displaying v. little. Pitelka collected 2 (separately) near cake-eater. 13 June Pitelka found a 3-egg nest on his plot. Most birds seem to be incubating now. Display is still here, but sparsely. 18 June Very calm now - birds quietly incubating. Nesting density is low - few nests are popping up by flushing of incubating bird. 21 June Nest near trapline I on Gasline Ridge is empty. About 50 m. from the empty cup 2o7o7 engaged in aggressive dispute on the ground, involving 'battering ram' behavior. Probably o7 from the empty nest and an adjacent o7.