. The Canadian field-naturalist. Nantucket Sound. Scale 0 VICINITY MAP 5 10 15 20 25 Miles Figure L Cape Cod and Monomoy Islands. and Cowardin et al. (1979) for wetland regimes. Plant names followed that of Lortie et al. (1991). Clutch size and hatching success per nest were determined for nests whose complete history was known. Fledging success was calculated from all nesting attempts. This division was established because some nests were located after all eggs had hatched. When nestlings dispersed from a nest, I located them in late afternoon or evening by their food begging calls. I returne
. The Canadian field-naturalist. Nantucket Sound. Scale 0 VICINITY MAP 5 10 15 20 25 Miles Figure L Cape Cod and Monomoy Islands. and Cowardin et al. (1979) for wetland regimes. Plant names followed that of Lortie et al. (1991). Clutch size and hatching success per nest were determined for nests whose complete history was known. Fledging success was calculated from all nesting attempts. This division was established because some nests were located after all eggs had hatched. When nestlings dispersed from a nest, I located them in late afternoon or evening by their food begging calls. I returned to these areas until I could determine how many nestlings fledged from each nest. I estimated territory sizes around nest sites, by using roosting sites, courtship flights, intraspecific territorial chases and skirmishes, and foraging bouts. I used 25 observations of some flight behavior per territory to estimate the sizes. I plotted these obser- vations on USGS topographical maps (scale 1:25 000). Minimum convex polygons were draw by connecting the outermost points. I then digitized the polygons to estimate territory sizes. I used a Numonics Corp Electronic Graphic Calculator and Digitablet (Model 2400) for these estimates. Results I located 22 nests during the study. I was unable to determine which sex selected the nest site. Males appeared to select the area, as indicated by their courtship sky-dancing flights. Nest sites were select- ed when the previous year's residual vegetation was. Please note that these images are extracted from scanned page images that may have been digitally enhanced for readability - coloration and appearance of these illustrations may not perfectly resemble the original Ottawa Field-Naturalists' Club. Ottawa, Ottawa Field-Naturalists' Club
Size: 2014px × 1241px
Photo credit: © Book Worm / Alamy / Afripics
License: Licensed
Model Released: No
Keywords: ., bookauthorottawafi, bookcentury1900, bookdecade1910, bookyear1919
