. The Canadian field-naturalist. 1979 Notes 439 Abandoned Windmill Used as a Nesting Site by Great Blue Herons Jean-Luc DesGranges Canadian Wildlife Service, 2700 Laurier Box 10100, Ste-Foy. Quebec GIV 4H5 DesGranges, Jean-Luc. 1979. Abandoned windmill used as a nesting site by Great Blue Herons. Canadian Field-Naturalist 93(4): 439^40. An active Great Blue Heron (Ardea herodias) nest was discovered on the platform of an abandoned windmill at Batture aux Loups-Marins, Quebec. Among the hundred or so heronries known in Quebec, this was the only one where a man-made structure was use
. The Canadian field-naturalist. 1979 Notes 439 Abandoned Windmill Used as a Nesting Site by Great Blue Herons Jean-Luc DesGranges Canadian Wildlife Service, 2700 Laurier Box 10100, Ste-Foy. Quebec GIV 4H5 DesGranges, Jean-Luc. 1979. Abandoned windmill used as a nesting site by Great Blue Herons. Canadian Field-Naturalist 93(4): 439^40. An active Great Blue Heron (Ardea herodias) nest was discovered on the platform of an abandoned windmill at Batture aux Loups-Marins, Quebec. Among the hundred or so heronries known in Quebec, this was the only one where a man-made structure was used. Un nid actif de Grand Heron (Ardea herodias) installesurla plateformed'uneeoliennedesaffecteeaetedecouvert ala Batture aux Loups-Marins, Quebec. Parmi la centaine de heronnieres connues au Quebec jusqu'a ce jour, c'est la premiere fois que Ton observe I'utilisation d'une structure artificielle par cette espece. Key Words; Ardea herodias, nesting platform. On 25 April 1978, while conducting an aerial survey of aquatic bird colonies in the St. Lawrence estuary for the Canadian Wildlife Service, Pierre Dupuis and I discovered an active Great Blue Heron (Ardea herodias) nest on the platform of an abandoned windmill at Batture aux Loups-Marins (47°I4'N, 70°25"W) (Figure 1). We located four other nests being built in a grove of tall willows (Salix sp.) in the vicinity of the windmill. There were no Great Blue Herons at this site prior to 1978 (Reed 1973; personal observation 1977). On 1 June, the heronry contained eight active nests, four of which contained only eggs (x ± SD = ± ) whereas the others, including the nest on the windmill, held both eggs and young. On 3 July, six nests remained, all with young herons (x ± SD = ± ). The nest located on the windmill held four young herons whereas the others held fewer than three each. Although Great Blue Herons have been recorded nesting on duck-hunting blinds (Stotts 1959) and navigational buoys (Henny 1978), i
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