Canadian Lakes Loon Survey
Wilson Bulletin Publication
Common Loon Pairs 
Raise Four-Chick Broods

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Loon Survey

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Participants of the Canadian Lakes Loon Surveys (CLLS) have provided a number of unique observations of Common Loon pairs accompanied by, and rearing, abnormally large broods. Three-chick loon broods are uncommon, and four-chick broods are extremely rare. This paper documents CLLS-derived records of Common Loons pairs rearing four-chick broods, some of which are accompanied by photographic evidence. 

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