. The Canadian field-naturalist. 1989 Braune: Migration and Breeding Range of Bonaparte's Gull 525 ically unexplored (M. Gosselin, personal commun- ication). The types of muskegs, ponds, and lakes that the Bonaparte's Gull frequents during the breeding season are, however, present in the coniferous zones of Quebec. Several nesting locations of Bonaparte's Gulls have been recorded in Quebec: (1) 1977 — Pointe Racine, Lac Saint- Jean (Quebec Nest Record Card Program), (2) 1982 — about 100 km up the Eastmain River (Gosselin and David 1982), and (3) 1983 — near Rouyn (David 1983) (Figure 1). Aeria
. The Canadian field-naturalist. 1989 Braune: Migration and Breeding Range of Bonaparte's Gull 525 ically unexplored (M. Gosselin, personal commun- ication). The types of muskegs, ponds, and lakes that the Bonaparte's Gull frequents during the breeding season are, however, present in the coniferous zones of Quebec. Several nesting locations of Bonaparte's Gulls have been recorded in Quebec: (1) 1977 — Pointe Racine, Lac Saint- Jean (Quebec Nest Record Card Program), (2) 1982 — about 100 km up the Eastmain River (Gosselin and David 1982), and (3) 1983 — near Rouyn (David 1983) (Figure 1). Aerial surveys, conducted by the Canadian Wildlife Service, Quebec Region, over the Eastmain, Opinaca and Petite Opinaca Rivers east of James Bay in Quebec, recorded maxima of 12 and 15 Bona- parte's Gulls during early June of 1981 and 1982, respectively (Y. Aubry, unpublished data). A pair of Bonaparte's Gulls with three downy young were observed at Saint-Gedeon on 5 July 1987, providing a new nesting locale for Lac Saint-Jean's small, disjunct breeding population (Yank et al. 1987), and a previously known colony of Bonaparte's Gulls was found on Lac Fleuricourt (near Lac Mistassini) on 8 July 1988 (Gosselin et al. 1988). Farther east, there is a record of a fully- fledged juvenile-plumaged bird as early as 25 July. Figure 1. Eastern breeding range E3 of the Bonaparte's Gull, and known or assumed nest sites x located in Quebec and Maine. The three main eastern migration routes to the Atlantic coast are as follows: a) Saguenay River — Upper Saint John River — St. Croix River — Quoddy region, southwestern Bay of Fundy; b) Lower Great Lakes — Mohawk River — Hudson River - Long Island, New York area; and c) Lower Great Lakes — Delaware River — Delaware Bay/ Chesapeake Bay. Most of the birds from the Lower Great Lakes, however, migrate via: d) the Mississippi River system. 1975 at Bonaventure on the north shore of Baie des Chaleurs in the Gaspe Peninsula (M. Gosselin
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