Summary of the December 14, 2015 Tucson Valley CBC

There seems to be no end to the increase in Cooper's Hawks numbers on the Tucson Valley CBC

There’s no other birding event like a Christmas Bird Count. Yes, there are other ways one can help census birds and monitor their populations, ranging from the Breeding Bird Survey, the Great Backyard Bird Count, the North American Migration Count, and of course just by using eBird. But none of those bring together a huge group of people on one day and force them to count birds all within 15 miles of each other and in places they’d never think of birding, such as cemeteries, golf courses (something like 20 in the Tucson Circle), desert washes, mobile home parks, and even homeless camps – and then get together for a species countdown in the evening. It’s like a cross between a birding festival and a bird survey, and amazing things happen.

This year we were beset with a fast-moving cold front that presented no sign at the beautiful and relatively warm dawn. It even looked like the weather forecast had been horribly wrong, but it wasn’t. By late morning it was drizzling in most places in the circle, and if it wasn’t raining, it was snowing. Some groups were caught miles up the Santa Catalina foothill canyons during the middle of the front’s passage. But after the 2-3 hours of squalls ended, the remaining hours were lively and bright, and those birders who didn’t quit early were rewarded with some excellent afternoon birding.

So while our species count of 153 sounds low compared to last year’s all-time Arizona high of 164, it’s actually the third highest count in 44 years, well above the average of 139. And thanks to the preparation of birders ready to count the departing roosts of Yellow-headed Blackbirds, we tallied the second highest number of individual birds ever on this CBC: 79,934 (almost half of those Yellow-headed Blackbirds). Subtract those blackbirds, and we still tallied more individuals than two-thirds of all previous counts. One can only imagine the numbers we might have had were it not for the weather.

Rare bird highlights were three new species for the all-time list. A juvenile Gray Hawk had been found by Keith Kamper and Patty Tersey while scouting before the CBC, and it was still present on the CBC day. So more surprising was a second bird found a few miles downstream by Laurens Halsey and Andrew Core. A Bonaparte’s Gull was flying around for Chris McCreedy, Michael Lester, and Homer Hansen at Silverbell Lake. Another big surprise was a Gray Catbird first heard then seen by Andrew Core and Laurens Halsey.

There were other rarities that weren’t new for the list but have been seen only once before. The stakeout Rufous-capped Warbler was in upper Ventana Canyon just beyond the circle’s edge for a while, then it came down just into the circle. A male Blue Grosbeak was big surprise south of Speedway on the Santa Cruz River. Not seen on this CBC since 1978 was Montezuma Quail, when three were flushed from upper Finger Rock Trail.

A Louisiana Waterthrush on the Santa Cruz was likely the same bird that had been there the two previous winters, while we had Pine Warbler and Neotropic Cormorant for only the 4^th time each. The latter is certainly increasing and can’t be considered a rarity any more, but who knows what the future holds.

Finally, there were a lot of rare to rarish species seen that we’ve only had on a third or fewer of the past 43 CBCs. If you go out birding around here on your own, you’d consider yourself lucky to find just one or two of these gems. So it’s worth remembering that these were all seen on the same day by an amazing team of volunteer counters. They are:

Yellow-bellied Sapsucker

Clay-colored Sparrow

Ring-billed Gull

Hooded Oriole

Eastern Bluebird

Black-and-white Warbler

Northern Parula

Eurasian Collared-Dove

Summer Tanager

Cassin’s Kingbird

Barn Swallow

Common Merganser

Snowy Egret

Greater Pewee

Wilson’s Warbler

Ash-throated Flycatcher

American Goldfinch

This Summer Tanager was found at Evergreen Cemetery by Gavin Bieber

Of note is that we had multiple Clay-colored Sparrows for only the second time ever (the first was last year), a ridiculous record high 4 Yellow-bellied Sapsuckers, and two Greater Pewees for only the second time ever.

The numbers we tallied always provides for some interesting data to mine. We tallied new high counts for 14 species, but Cooper’s Hawk in particular stands out, as we broke the all-time national high last year by a fair margin with 136. This year we had an astounding 152.

Additional new highs for this particular circle are listed below. The first number in the parentheses is our previous high count, and the second is the year in which that number was recorded.

Common Merganser 13 (7 – 2004)

Neotropic Cormorant 22 (2 –2012, 2014)

Eurasian Collared-Dove 617 (327 – 2013)

Barn Owl 6 (5 – 2011)

Costa’s Hummingbird 73 (56 – 2014)

Yellow-bellied Sapsucker 4 (2 – 2014)

Merlin 5 (5 – 2014)

Peregrine Falcon 16 (14 – 2014)

Greater Pewee 2 (2 – 1998)

Gray Flycatcher 4 (3 – 2014)

Black-tailed Gnatcatcher 176 (169 – 1991)

Chipping Sparrow 505 (455 – 1977)

Brewer’s Sparrow 749 (727 – 1999)

Yellow-headed Blackbird 39,725 (19,055, 2014)

I always like to look for birds for which we might get the national high each year. We didn’t see our own record high for the following species, but there are often more of these on the Tucson Valley count than any other. The final results will be known only after all compilers have submitted their lists.

We most certainly had the national high of Vermilion Flycatchers with 311, but true numbers might have been hampered by the birding conditions.

Rock Pigeon 5779

Mourning Dove: 6137

Broad-billed Hummingbird: 37

Gila Woodpecker: 538

Vermilion Flycatcher: 311

Plumbeous Vireo: 13

Cassin's Vireo: 10

Verdin: 652

Black-throated Gray Warbler: 19

Louisiana Waterthrush: 1

House Finch: 3636

Lesser Goldfinch: 2267

Greater Pewee: 2

I looked at species for which we had low counts as well, making a note of those that are below 25% of the long-term average.

Northern Pintail 4

Least Sandpiper 39

Wilson’s Snipe 1

Inca Dove 12

Northern Flicker 20

Canyon Towhee 4

Rufous-crowned Sparrow 4

Spotted Towhee 6

Brown-headed Cowbird 4

The Canyon Towhee numbers were especially shocking, and we nearly missed Brown-headed Cowbird for the first time. Inca Dove seems to be holding steady. But looking at birds that did poorly last year, Gilded Flicker and Loggerhead Shrike numbers are up a bit, but Cactus Wren has dropped a bit.

Then there are our misses. There were six species which were seen during the three days before and after count day and most certainly were in still in the circle. In fact, the Baltimore Oriole suddenly reappeared weeks later.

Blue-winged Teal

Black-necked Stilt

Dusky Flycatcher

Eastern Meadowlark

Baltimore Oriole

Pine Siskin

The following were also reported on eBird within a couple weeks of the count and probably were in the circle, but you can never see them all.

Long-billed Dowitcher

Hammond’s Flycatcher

Bullock’s Oriole

Brown Thrasher

Bell’s Vireo

White-throated Sparrow

Wood Duck

Then there are those residents we know are in the circle but were missed almost certainly because of the weather.

Golden Eagle

White-throated Swift

Acorn Woodpecker

Arizona Woodpecker

Western Scrub-Jay
Bushtit

Total Species List:

Snow Goose	1
Gadwall	62
American Wigeon	1377
Mallard (Northern)	327
Mallard (Mexican)	2
Mallard (Mexican intergrade)	3
Cinnamon Teal	15
Northern Shoveler	366
Northern Pintail	4
Green-winged Teal	73
Canvasback	24
Redhead	2
Ring-necked Duck	95
Lesser Scaup	17
Bufflehead	7
Hooded Merganser	2
Common Merganser	13
Ruddy Duck	94
Gambel's Quail	498
Montezuma Quail	3
Pied-billed Grebe	51
Eared Grebe	15
Neotropic Cormorant	22
Double-crested Cormorant	12
Great Blue Heron (Blue form)	18
Great Egret	20
Snowy Egret	4
Green Heron	5
Black-crowned Night-Heron	24
Northern Harrier	7
Sharp-shinned Hawk	12
Cooper's Hawk	152
Harris's Hawk	24
Gray Hawk	2
Red-tailed Hawk	119
Virginia Rail	4
Sora	5
Common Gallinule	5
American Coot	785
Killdeer	135
Spotted Sandpiper	8
Least Sandpiper	39
Wilson's Snipe	1
Bonaparte's Gull	1
Ring-billed Gull	1
gull sp.	1
Rock Pigeon (Feral Pigeon)	5779
Eurasian Collared-Dove	617
Inca Dove	12
White-winged Dove	53
Mourning Dove	6137
Greater Roadrunner	13
Barn Owl	6
Western Screech-Owl	4
Great Horned Owl	11
Anna's Hummingbird	279
Costa's Hummingbird	73
Broad-billed Hummingbird	37
hummingbird sp.	16
Belted Kingfisher	9
Gila Woodpecker	538
Yellow-bellied Sapsucker	4
Red-naped Sapsucker	5
Ladder-backed Woodpecker	75
Northern Flicker (total)	20
Northern Flicker (Red-shafted)	20
Gilded Flicker	23
Northern/Gilded Flicker	1
American Kestrel	87
Merlin	5
Peregrine Falcon	16
Prairie Falcon	4
Greater Pewee	2
Gray Flycatcher	4
Black Phoebe	23
Say's Phoebe	62
Vermilion Flycatcher	311
Ash-throated Flycatcher	2
Cassin's Kingbird	2
Loggerhead Shrike	16
Plumbeous Vireo	13
Cassin's Vireo	10
Hutton's Vireo	7
Mexican Jay	6
Common Raven	60
Northern Rough-winged Swallow	11
Barn Swallow	1
swallow sp.	2
Bridled Titmouse	6
Verdin	652
White-breasted Nuthatch	2
Brown Creeper	1
Rock Wren	46
Canyon Wren	10
House Wren	25
Marsh Wren	15
Bewick's Wren	25
Cactus Wren	146
Blue-gray Gnatcatcher	21
Black-tailed Gnatcatcher	176
gnatcatcher sp.	2
Ruby-crowned Kinglet	425
Eastern Bluebird	4
Western Bluebird	53
Hermit Thrush	13
American Robin	6
Gray Catbird	1
Curve-billed Thrasher	96
Crissal Thrasher	2
Northern Mockingbird	145
European Starling	1940
American Pipit	62
Cedar Waxwing	8
Phainopepla	258
Louisiana Waterthrush	1
Black-and-white Warbler	1
Orange-crowned Warbler	86
Common Yellowthroat	9
Northern Parula	1
Pine Warbler	1
Yellow-rumped Warbler (total)	1340
Yellow-rumped Warbler (Myrtle)	4
Yellow-rumped Warbler (Audubon's)	1336
Black-throated Gray Warbler	19
Rufous-capped Warbler	1
Wilson's Warbler	1
Rufous-winged Sparrow	15
Chipping Sparrow	505
Clay-colored Sparrow	3
Black-chinned Sparrow	5
Brewer's Sparrow	749
Black-throated Sparrow	54
Lark Sparrow	60
Lark Bunting	165
Dark-eyed Junco (total)	63
Dark-eyed Junco (unknown type)	12
Dark-eyed Junco (Slate-colored)	1
Dark-eyed Junco (Oregon)	39
Dark-eyed Junco (Pink-sided)	8
Dark-eyed Junco (Gray-headed)	3
Yellow-eyed Junco	1
White-crowned Sparrow (total)	2127
White-crowned Sparrow (oriantha)	5
White-crowned Sparrow (Gambel's)	2122
Vesper Sparrow	8
Savannah Sparrow	6
Song Sparrow	68
Lincoln's Sparrow	130
Canyon Towhee	4
Abert's Towhee	401
Rufous-crowned Sparrow	4
Green-tailed Towhee	7
Spotted Towhee	6
Summer Tanager	1
Northern Cardinal	51
Pyrrhuloxia	28
Blue Grosbeak	1
Red-winged Blackbird	1168
Western Meadowlark	54
Western/Eastern Meadowlark	1
Yellow-headed Blackbird	39725
Brewer's Blackbird	1811
Great-tailed Grackle	1009
Bronzed Cowbird	85
Brown-headed Cowbird	4
Hooded Oriole	1
blackbird sp.	200
House Finch	3636
Lesser Goldfinch	2267
Lawrence's Goldfinch	21
American Goldfinch	1
House Sparrow	1076

Total species:153

Total  individuals: 79934