. The Canadian field-naturalist. 2004 HoMAN, LiNz, Engeman, and Penry: Dispersal Patterns of Blackbirds 205 60 N. 120 W ,115 W now 100 W 95 W 55 N Outside-peripheral polygon. Peripheral polygon Core polygon 1o .0 X 1 study block O Female ? Male ^ Marking site 300 Kilometers Figure 2. Locations of 33 marked Red-winged Blackbirds (in relation to core, peripheral- and outside-peripheral polygons) after dispersing from a spring staging site in eastern South Dakota in April 2001. Table 1. Color-marked male (cf) and female (5) Red-winged Blackbirds collected during June and July 2001 in core, periph
. The Canadian field-naturalist. 2004 HoMAN, LiNz, Engeman, and Penry: Dispersal Patterns of Blackbirds 205 60 N. 120 W ,115 W now 100 W 95 W 55 N Outside-peripheral polygon. Peripheral polygon Core polygon 1o .0 X 1 study block O Female ? Male ^ Marking site 300 Kilometers Figure 2. Locations of 33 marked Red-winged Blackbirds (in relation to core, peripheral- and outside-peripheral polygons) after dispersing from a spring staging site in eastern South Dakota in April 2001. Table 1. Color-marked male (cf) and female (5) Red-winged Blackbirds collected during June and July 2001 in core, peripheral, and outside-peripheral polygons after migratory dispersal from a staging site in eastern South Dakota during April 2001. Number units^ Number Collected Number Marked ^ No birds were collected in two units Percent Marked Polygon Cf Q Total Cf $ Total Cf 9 All Core Peripheral Outside 14 15 27 793 681 924 668 605 787 1461 1286 1 711 9 10 4 6 2 2 15 12 6 Total 56 2 398 2 060 4 458 23 10 33 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
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