Seven members of GMAS did May survey of Delta Park IBA this cool, cloudy,
still morning.  Highlights included a Tricolored Heron in the marsh, and a
good fallout of warblers near the picnic bench at the park entrance.  The
list:

70+ Double-crested Cormorant
7   Great Blue Heron
2   Black-crowned Night Heron
1   Tricolored Heron*
12  Canada Goose
10  Wood Duck
11  Mallard
3   Blue-winged Teal*
6   Common Merganser (including 4 ducklings)
1   Killdeer
1   Least Sandpiper
5   Ring-billed Gull
5   Great Black-backed Gull
2   Caspian Tern
7   Mourning Dove
2   Belted Kingfisher
3   Downy Woodpecker
6   Least Flycatcher*
1   Phoebe
12  Warbling Vireo
1   Blue Jay
3   Am. Crow
1   No. Raven
14  Tree Swallow
1   Black-c. Chickadee
2   White-breasted Nuthatch
8   Am. Robin
1   Gray Catbird
2   Yellow Warbler
1   Chestnut-sided Warbler*
2   Magnolia Warbler*
2   Yellow-rumped Warbler
3   Black-throated Green Warbler
1   Blackburnian Warbler*
1   Common Yellowthroat
1   Ovenbird
1   Wilson's Warbler*
1   Savannah Sparrow
7   Song Sparrow
4   No. Cardinal
31  Red-winged Blackbird
20  Common Grackle
5   Brown-headed Cowbird
4   Baltimore Oriole
10  Am. Goldfnch

* = new for our Delta Park surveys

All in all, a good morning of birding.

Carl Runge