. Life histories of North American diving birds : order Pygopodes . Cape Whittle, Quebec. C. W. Bird Rock, Quebec. MURRE. For description see page 2Se. A. C. Bent. LIFE HISTOEIES OF NORTH AMERICAN DIVING BIRDS. 177 When about 5 or 6 weeks old, long before they are grown or fullyfledged, they are able to take to the water and they often do so, eitheraccidentally or because forced off the ledges by their parents. Be-cause of this habit the breeding rookeries are deserted by both oldand young birds much earlier than would be expected and longbefore the other species that breed with the
. Life histories of North American diving birds : order Pygopodes . Cape Whittle, Quebec. C. W. Bird Rock, Quebec. MURRE. For description see page 2Se. A. C. Bent. LIFE HISTOEIES OF NORTH AMERICAN DIVING BIRDS. 177 When about 5 or 6 weeks old, long before they are grown or fullyfledged, they are able to take to the water and they often do so, eitheraccidentally or because forced off the ledges by their parents. Be-cause of this habit the breeding rookeries are deserted by both oldand young birds much earlier than would be expected and longbefore the other species that breed with them have left. Duringthe last week in July, 1915,1 visited Bird Eock to study and collectthe young of the various species to be found breeding there, but wasdisappointed to find that many, perhaps most, of the common murreshad left. There were quite a number of very small downy youngwhich were still unable to move about much and a few of the largeryoung, about half grown and wearing their soft, juvenal plumage;these half-grown birds were very lively and very noisy; evidentlythey had about reached the st
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