Sunday, September 2, 2012

Deep Bay Jaegers

Today I spent about 5 hours birding at Deep Bay, which is near Bowser, on Vancouver Island. This site is a great place to observe interactions between terns, gulls and jaegers from mid-August through September. Although there were only about 25 Common Terns and 200 Bonaparte's Gulls, the jaeger action was intense all through the morning. I observed 62 different chases in that time, most of them by Parasitic Jaegers pursuing Bonaparte's Gulls. There was at least one Pomarine Jaeger as well, which is a very good sighting for this site, although by no means the first. The three species of North American Jaegers, as well as South Polar Skua, have all been noted in this area over the years.
Birds observed at Deep Bay on 2 Spetemebr 2012:

Mute Swan x Trumperter Swan hybrid: 2
Canada Goose: 44
American Wigeon: 6
Mallard: 2
Northern Pintail: 17
Green-winged Teal: 10
Harlequin Duck: 3
Surf Scoter: 83
White-winged Scoter: 52
Common Merganser: 6
Common Loon: 7
Red-necked Grebe: 565 (Deep Bay is a major fall molt site for this species)
Double-crested Cormorant: 26
Pelagic Cormorant: 11
Great Blue Heron: 3
Turkey Vulture: 10 (migrating across from Denman Island)
Osprey: 1
Cooper's Hawk: 2 (migrating across from Denman Island)
Merlin: 1
Killdeer: 5
Black Oystercatcher: 2
Sanderling: 1
Western Sandpiper: 24
Least Sandpiper: 2
Baird's Sandpiper: 2
Red-necked Phalarope: 8
Pomarine Jaeger: 1
Parasitic Jaeger: 20+- (estimate)
Bonaparte's Gull: 200+- (estimate)
Heerman's Gull: 1
Mew Gull: 12
California Gull: 26
Glaucous-winged Gull: 51
Common Tern: 20+- (estimate)
Common Murre: 10
Pigeon Guillemot: 6
Marbled Murrelet: 3
Rock Pigeon: 22
Band-tailed Pigeon: 18
Eurasian Collared-dove: 11
Common Nighthawk: 33
Anna's Hummingbird: 1
Belted Kingfisher: 2
Purple Martin: 12
Barn Swallow: 2
American Pipit: 1
Savannah Sparrow: 9
Red Crossbill: 116
American Goldfinch: 2

No comments: