Christine and Geoff Williamson led a COS/Sierra Club group in Chicago's Burnham Park yesterday (Saturday, 12 Oct 2013).  We started at 39th Street and made our way up to about 31st Street and then head back south.  We had 41 species of birds, plus five butterfly species (one Black Swallowtail, Cabbage White, Clouded/Orange Sulphur, Eastern Tailed-Blue, and Common Buckeye) and one dragonfly species (Common Green Darner).  Below is the bird list.  As expected for this location, we had a lot of sparrows, including two NELSON'S SPARROWS.

Good Birding,

Burnham Park, Centennial Prairie between 31st and 39th, Cook, US-IL
Oct 12, 2013 7:00 AM - 10:30 AM
Protocol: Traveling
2.2 mile(s)
Comments:     Chicago Ornithological Society / Chicago Group of Sierra Club field  led by Geoff & Chris Williamson; 61 deg F, winds S at 10 mph, clear skies; 2.2 miles traveled on foot.
41 species

Canada Goose 43
Mallard 1
Red-breasted Merganser 1

Double-crested Cormorant 88

Cooper's Hawk 1

Ring-billed Gull 325
Herring Gull 1

Mourning Dove 1

Yellow-bellied Sapsucker 2
Downy Woodpecker 2
Northern Flicker 3

Eastern Phoebe 2

American Crow  7

Black-capped Chickadee 11

Red-breasted Nuthatch 1

House Wren 2
Winter Wren 3
Marsh Wren 3

Golden-crowned Kinglet 4
Ruby-crowned Kinglet 3

Hermit Thrush 8

European Starling 25

Nashville Warbler 2
Common Yellowthroat 1
Magnolia Warbler 1
Palm Warbler 10
Yellow-rumped Warbler 17

Savannah Sparrow 20
Nelson"s Sparrow 2
Song Sparrow 11
Lincoln"s Sparrow 11
Swamp Sparrow 20
White-throated Sparrow 275
White-crowned Sparrow 10
Dark-eyed Junco 28

Northern Cardinal 4

Indigo Bunting 2

Red-winged Blackbird 126
Brown-headed Cowbird 40

American Goldfinch 87

House Sparrow 15

Geoffrey A. Williamson  -  Chicago, Cook County, Illinois
Chair, IOS Ornithological Research and Data Committee
Member, Illinois Ornithological Records Committee of IOS