Concord CBC: 20,082 American Robins

The Concord Christmas Bird Count, inaugurated December 31, 1960, is centered on a point where the towns of Concord, Sudbury, Stow, and Maynard converge, defining the center point of a circle that entirely or partially encloses eighteen towns. Our first count had 23 participants in six parties in Concord and a single volunteer in neighboring Lincoln. Modern participation levels fluctuate between 260 and 300 field participants and feeder watchers. Our complete results with effort data will be posted end of February.

RUGR

PUFI HOFI

NOCA TUTI

AMRO

A few species seen on the first count such as ring-necked pheasant (94) and ruffed grouse (23) are all but totally extinct today. Evening grosbeaks were a common spectacle on feeder boards and crabapples every year, peaking at 1,672 in 1983; this year the irruption missed us entirely for a count of zero. Purple finch (12) and house finch (0) were reversed in abundance similar to mallard (2) and American black duck (20). Rarities on this prehistoric date were pileated woodpecker (1), tufted titmouse and Northern cardinal (Count Week only), and American robin (4) when the majority of our robins had highly migratory inclinations and the partial migrants and nomadic flocks we see on the count today were comparatively scarce. Red-tailed hawks (2) were soon to proliferate with the maturing and expansion of suitable forestland nesting habitat and it is now common to see one or a pair of red-tails soaring over every large agricultural field. Annual results have averaged 155 the previous 15 years.

RTHA

Sunday December 30 our daylight parties pulled up their winter socks and set out early morning in bright, cool, and calm weather. Lakes and large ponds were open after an early December freeze-over and ducks had returned improving our species total from last year’s underachieving 78. Twelve of our 14 gadwall were scoped in a single flotilla with mallards by our Bedford sector leader. Hager Pond in Marlborough again delivered Northern shovelers, green-winged teal, and Northern pintails; the Acton sector tallied 4 of the total 12 on the School Street fields. Way to go, Acton! Hager Pond’s annual overwintering American coot appears to have vanished. Bald eagles and peregrine falcons have to eat, too.

Speaking of BALD EAGLE, this year’s total, considering multiple counts and level participation, may have achieved a new high of 14. Other records may be in the math for NORTHERN BARRED OWL (27), YELLOW-BELLIED SAPSUCKER (5—a tie with one recent record), and possibly COMMON RAVEN (20) which is difficult to census because these intelligent and noble corvids show little respect for town sector borders and travel widely. But the most dramatic high is AMERICAN ROBIN (20,082)—over 18,000 roosting in Wayland’s Wash Brook—smashing 2003’s previous record 7,591. European starlings (7,470) have also formed a roost in Wayland, nailing to the wall a ten-year record for these guys, but far from 1971’s 18,000 before large dairy farms vanished.

We wrote the final chapter about the decline of herring gull on the Concord count and a record low this year for the once abundant RING-BILLED GULL (48) is not an unexpected postscript.

Unusual records this year are warblers, including a first PALM WARBLER that completed its migration early December on Pine Hill in Concord and was relocated and skillfully photographed by a member of the Concord College of Ornithology, which also turned up one of our two common yellowthroats. Wayland’s Wash Brook Rare Bird Detective Agency, open for business well before dawn when most birders have barely risen from their beds, located and photographed a YELLOW-BREASTED CHAT, a third record. The WBRBDA had  previously eBirded the robin and starling roosts and turned up one of our three wintering gray catbirds. Dumetella, which means (in Latin I presume) “small thicket” is the genus name for this plain gray small-thicket bird with a black cap and mahogany undertail that is perfectly happy to dine on oriental bittersweet fruit when little else is spread on winter’s austere buffet table.

Let us respect the bravery of these rare winter visitors and all the other birds and wildlife now settled into their winter home, for frigid wind and harsh weather and scarcity impose a cruel and unforgiving test of animal adaptation and survival.

Finally, special thanks to our skilled and ambitious young birders who join us every year and contribute their keen eyes, ears, and skill to the count because they are of course our future CBC counters and leaders and another extravagant thank you to our sponsor, SUDBURY VALLEY TRUSTEES, and executive director Lisa Vernegaard who hosts our countdown and pot luck supper in SVT’s Wolbach farmhouse.

Please join us again this year Sunday December 29, 2019 for another adventure in winter birding.

A first draft of our checklist is published below.

Canada Goose 3,017
Mute Swan 40
Gadwall 14 – (12 seen together with mallards in Bedford GM)
American Black Duck 50
Mallard 809
Northern Shoveler 2 – show every CBC — usually on Hager Pond.
Northern Pintail 12
Green-winged Teal 2 – Hager Pond Marlborough
Bufflehead 5 – ponds and lakes open
Common Goldeneye 25
Hooded Merganser 25
Common Merganser 102 – a few reported in flight
Wild Turkey 210 – first in 1997 (9) to 323 by 2010
Great Blue Heron 8
Turkey Vulture 1
Northern Harrier 1
Sharp-shinned Hawk 13
Cooper’s Hawk 37
Bald Eagle 14 – New high count. May be a few double counted in this number. Five in Concord.
Red-shouldered Hawk 2
Red-tailed Hawk 186 – steady increase from 2 in 1960
Ring-billed Gull 48 – new low count
Herring Gull 22
Rock Pigeon 787
Mourning Dove 1,159 – H. D. Thoreau’s doves were likely passenger pigeons
Eastern Screech-owl 23
Great Horned Owl 52
Barred Owl 27
Northern Saw-whet Owl 5
Belted Kingfisher 6
Red-bellied Woodpecker 282
Yellow-bellied Sapsucker 5 – tie with 2013.
Downy Woodpecker 749
Hairy Woodpecker 169
Northern Flicker 55
Pileated Woodpecker 59
American Kestrel 1 – double digits 1971-1987.
Merlin 2
Northern Shrike 2
Blue Jay 1,640
American Crow 389
Fish Crow 1 – Twenty previous occurrences. 394 in 1990.
Common Raven 20 – New high count. Double counting an issue, though.
Horned Lark 22
Black-capped Chickadee 2,280
Tufted Titmouse 1,119
Red-breasted Nuthatch 25
White-breasted Nuthatch 913
Brown Creeper 56
Winter Wren 16
Marsh Wren 5
Carolina Wren 127
Golden-crowned Kinglet 77
Ruby-crowned Kinglet 2
Eastern Bluebird 386
Hermit Thrush 8 – 7 in the Lincoln sector.
American Robin 20,082 – New high count. Roost in Wayland Wash Brook.
Gray Catbird 3
Northern Mockingbird 63 – Long diminishing numbers, now steady. Adj. HC in 1991, 301.
European Starling 7,740 – Ten-year peak.
Cedar Waxwing 283
Snow Bunting 16
Palm Warbler 1 – First count record. Present in Concord since Dec 9.
https://ebird.org/view/checklist/S51095618

Pine Warbler 1 – provisional, description only.
Common Yellowthroat 2 – Ten previous occurrences
Yellow-breasted Chat 1 – Third record.
https://macaulaylibrary.org/asset/132682451

American Tree Sparrow 349
Chipping Sparrow 4
Field Sparrow 1
Fox Sparrow 3
Dark-eyed Junco 2,733 – Almost 10,000 in 2009.
White-crowned Sparrow 1
White-throated Sparrow 365
Savannah Sparrow 9
Song Sparrow 421
Swamp Sparrow 21
Northern Cardinal 863
Red-winged Blackbird 199
Rusty Blackbird 1
Common Grackle 40
Brown-headed Cowbird 48
Baltimore Oriole 1
House Finch 660
Purple Finch 33
Common Redpoll 6
Pine Siskin 20
American Goldfinch 1,290
House Sparrow 2,414

Total number of individuals – 52,518, a new count high by 163.
Total species – 88


 

This entry was posted in Uncategorized. Bookmark the permalink.

Leave a Reply

Please log in using one of these methods to post your comment:

WordPress.com Logo

You are commenting using your WordPress.com account. Log Out /  Change )

Google+ photo

You are commenting using your Google+ account. Log Out /  Change )

Twitter picture

You are commenting using your Twitter account. Log Out /  Change )

Facebook photo

You are commenting using your Facebook account. Log Out /  Change )

Connecting to %s