Ventura Audubon Society
Christmas Bird Counts
(since 1980)
Count Circle & Sectors
Years on Record: 42
Total Species Recorded: 304
Most Species Recorded: 202 (1987)
Least Species Recorded: 156 (1981)
Average Species Recorded: 178
Counts by Year
Special Thanks to Karl Krause
The Ventura Audubon Society honors Karl Krause for his 18 years of dedicated service as our Christmas Bird Count Compiler. Karl officially took on the responsibility in 1996, and finally handed over the reins in 2014, but he's been compiling CBC data since 1980 when VAS first started the annual tallies. In addition he fulfilled a long term role as the Lake Casitas sector leader. As Compiler, Karl worked hard to assure the greatest accuracy possible, a difficult and sometimes thankless challenge. With a keen mind for data and analysis he has enjoyed adding value beyond the national Audubon standards. It is due to Karl's forward thinking, and the help of so many CBC volunteers, that we are able to present 42 years of data which exposes some very interesting and important trends in our local species populations.
Interesting Trends
(click on species for history)
The following species are deemed as trending up or down based on averages of both the first and last halves of the cumulative count years. Upward trends are indicated where the difference in the count average for the latter half of count years relative to the first half is greater than or equal to 100%. Downward trends are indicated where the difference in the count average for the latter half of count years relative to the first half is greater than or equal to 50%. The assessments, based on an algorithm of somewhat arbitrary computations, are programmed to at least provide notice to some apparent trends. Isolated spikes, inconsistent with overall species data, are mitigated in the computations. This means that the averages will not always be perfectly consistent with the actual history data, which are available via the species links. If the current total of count years is an odd number, the old and new averages will share the middle year. Species with very low or sporadic incidences are excluded from these listings.
Note: Counts from year to year are subject to logistical variances beyond control and may not accurately reflect actual population trends in some cases.
Trending Up
(delta as % of avg count for first half of count years)
Snow Goose
+128%
Greater Scaup
+194%
Hooded Merganser
+183%
Red-throated Loon
+155%
Pacific Loon
+1044%
Horned Grebe
+130%
Western Grebe
+216%
Black-vented Shearwater
+811%
Brandt's Cormorant
+702%
Pelagic Cormorant
+180%
American White Pelican
+7087%
Brown Pelican
+303%
Bald Eagle
+1034%
Black Oystercatcher
+900%
Snowy Plover
+387%
Long-billed Curlew
+353%
Marbled Godwit
+169%
Black Turnstone
+135%
Pomarine Jaeger
+240%
Parasitic Jaeger
+178%
Common Murre
+1674%
Rhinoceros Auklet
+1031%
Royal Tern
+221%
Eurasian Collared-Dove
+2372%
Western Screech-Owl
+148%
Costa's Hummingbird
+167%
Allen's Hummingbird
+1788%
Hairy Woodpecker
+104%
Merlin
+113%
Peregrine Falcon
+233%
Cassin's Kingbird
+106%
American Crow
+143%
Violet-green Swallow
+118%
White-breasted Nuthatch
+131%
Mountain Bluebird
+165%
Great-tailed Grackle
+309%
Trending Down 
(delta as % of avg for first half of count years)
Ross's Goose
-80%
Wood Duck
-50%
Cinnamon Teal
-82%
Northern Pintail
-94%
Green-winged Teal
-66%
Canvasback
-87%
Redhead
-63%
Cattle Egret
-100%
Green Heron
-74%
Sharp-shinned Hawk
-51%
Ferruginous Hawk
-74%
Common Gallinule
-58%
Black-necked Stilt
-94%
American Avocet
-94%
Wandering Tattler
-63%
Greater Yellowlegs
-53%
Dunlin
-97%
Western Sandpiper
-85%
Long-billed Dowitcher
-79%
Wilson's Snipe
-75%
Bonaparte's Gull
-98%
Herring Gull
-81%
Glaucous-winged Gull
-68%
Spotted Dove
-100%
Loggerhead Shrike
-65%
Hutton's Vireo
-59%
Horned Lark
-60%
Mountain Chickadee
-90%
Golden-crowned Kinglet
-74%
Varied Thrush
-87%
Nashville Warbler
-51%
Rufous-crowned Sparrow
-89%
Chipping Sparrow
-51%
Swamp Sparrow
-69%
Golden-crowned Sparrow
-50%
Western Tanager
-69%
Tricolored Blackbird
-56%
Brown-headed Cowbird
-77%
Bullock's Oriole
-75%
Uncommon: Recent Abundance (2021)
Rare: Recent Abundance (2021)
Note: Years prior to 1996 have incomplete sector counts.
* Count Day. Not added to total species count (6).
** Count week only. Not added to total species count (0).
*** None found this year (124).
Total Species
click for counts by year
180491118648386513719
SWANS, GEESE & DUCKS
Historical (high,low,avg)
Count TotalVentura RiverLake CasitasOjaiCanada LargaWheeler CanyonVenturaSCREPacific Ocean
000000000
(6,0,1)
000000000
(6,0,1)
000000000
(30,0,1)
000000000
000000000
(344,0,39)
31091500070
(1,0,0)
000000000
(3,0,0)
000000000
(12,0,1)
100100000
(228,10,107)
1167501000580
000000000
(363,3,150)
5101917000150
(709,40,254)
153182020020930
000000000
(463,2,71)
700000070
(619,8,140)
229010000001290
(461,0,27)
000000000
(887,7,95)
27023000040
(112,0,19)
000000000
(34,0,3)
100000010
(266,0,24)
500500000
(11,0,2)
101000000
(84,0,24)
19003000160
000000000
000000000
(206,0,59)
66000000597
000000000
(2,0,0)
000000000
000000000
(103,13,44)
35572000210
200000020
(41,0,9)
220000000
(63,0,8)
12010000020
800000080
(753,78,293)
15113820001100
PARTRIDGES, QUAIL, GROUSE & TURKEYS
Count TotalVentura RiverLake CasitasOjaiCanada LargaWheeler CanyonVenturaSCREPacific Ocean
(453,4,168)
13203872461200
(41,0,3)
000000000
LOONS
Count TotalVentura RiverLake CasitasOjaiCanada LargaWheeler CanyonVenturaSCREPacific Ocean
(266,0,44)
600000006
(553,0,39)
15000000015
(105,0,7)
101000000
(41,0,4)
000000000
GREBES
Count TotalVentura RiverLake CasitasOjaiCanada LargaWheeler CanyonVenturaSCREPacific Ocean
(164,15,55)
14021611001200
(24,0,6)
000000000
000000000
(341,0,49)
420100000320
(7227,12,1399)
21730270000031900
(349,0,42)
320120000020
(7019,0,1160)
670000000006700
SHEARWATERS & PETRELS
Count TotalVentura RiverLake CasitasOjaiCanada LargaWheeler CanyonVenturaSCREPacific Ocean
(1,0,0)
100000001
000000000
000000000
000000000
000000000
000000000
5000000000500
000000000
CORMORANTS
Count TotalVentura RiverLake CasitasOjaiCanada LargaWheeler CanyonVenturaSCREPacific Ocean
(670,0,54)
1000000008515
12251100001060
800000080
000000000
PELICANS & BOOBIES
Count TotalVentura RiverLake CasitasOjaiCanada LargaWheeler CanyonVenturaSCREPacific Ocean
85340000780
(2063,3,370)
2063400000201445
BITTERNS & HERONS
Count TotalVentura RiverLake CasitasOjaiCanada LargaWheeler CanyonVenturaSCREPacific Ocean
000000000
(90,19,46)
401110200260
(57,3,22)
1607500040
(154,8,32)
24060000180
000000000
(30,0,5)
000000000
(19,0,4)
200000020
66010000650
800000080
IBISES & SPOONBILLS
Count TotalVentura RiverLake CasitasOjaiCanada LargaWheeler CanyonVenturaSCREPacific Ocean
000000000
AMERICAN VULTURES
Count TotalVentura RiverLake CasitasOjaiCanada LargaWheeler CanyonVenturaSCREPacific Ocean
(298,0,122)
207560500717680
KITES, EAGLES & HAWKS
Count TotalVentura RiverLake CasitasOjaiCanada LargaWheeler CanyonVenturaSCREPacific Ocean
(7,1,3)
310000020
000000000
(3,0,1)
303000000
(29,3,9)
1003010060
302100000
(35,3,12)
902310210
000000000
25011610160
000000000
(153,43,88)
81116260515180
400211000
000000000
(3,0,1)
000000000
RAILS & COOTS
Count TotalVentura RiverLake CasitasOjaiCanada LargaWheeler CanyonVenturaSCREPacific Ocean
(6,0,1)
100000010
(17,0,4)
100000010
100000010
(2654,313,1069)
5831341111001570
CRANES
Count TotalVentura RiverLake CasitasOjaiCanada LargaWheeler CanyonVenturaSCREPacific Ocean
000000000
STILTS & AVOCETS
Count TotalVentura RiverLake CasitasOjaiCanada LargaWheeler CanyonVenturaSCREPacific Ocean
000000000
(214,0,22)
000000000
OYSTERCATCHERS
Count TotalVentura RiverLake CasitasOjaiCanada LargaWheeler CanyonVenturaSCREPacific Ocean
100000010
500000050
(401,18,121)
58000000580
000000000
PLOVERS
Count TotalVentura RiverLake CasitasOjaiCanada LargaWheeler CanyonVenturaSCREPacific Ocean
(200,0,56)
1080000001080
200000020
(358,23,141)
23021240050
000000000
SANDPIPERS & PHALAROPES
Count TotalVentura RiverLake CasitasOjaiCanada LargaWheeler CanyonVenturaSCREPacific Ocean
(21,3,12)
723000020
100000010
(37,0,14)
100000010
(756,16,94)
16120000040
000000000
(23,0,7)
300000030
400000040
(194,0,31)
300000030
(15,0,6)
400000040
(45,2,20)
37000000370
(109,0,15)
20000000200
(784,76,267)
1584000001540
(40,0,5)
000000000
(250,5,75)
900100000800
000000000
(210,0,21)
20000000200
000000000
300000030
000000000
000000000
000000000
000000000
SKUAS & JAEGERS
Count TotalVentura RiverLake CasitasOjaiCanada LargaWheeler CanyonVenturaSCREPacific Ocean
(5,0,1)
200000002
(10,0,1)
100000001
000000000
AUKS, MURRES & PUFFINS
Count TotalVentura RiverLake CasitasOjaiCanada LargaWheeler CanyonVenturaSCREPacific Ocean
(100,0,6)
700000007
000000000
000000000
000000000
000000000
GULLS & TERNS
Count TotalVentura RiverLake CasitasOjaiCanada LargaWheeler CanyonVenturaSCREPacific Ocean
000000000
(900,0,125)
16010000114
000000000
(926,17,210)
5055000000295160
(1336,13,285)
16413000000430
(1362,75,347)
537141050005080
(6108,60,1023)
79920000001353650
(2164,35,477)
33204000030325
(517,0,25)
200000020
(4,0,1)
100000010
17000000152
000000000
000000000
(2105,0,186)
60000000600
(6,0,1)
000000000
(258,0,36)
000000000
(43,0,10)
400000031
(16,0,0)
000000000
(15,0,1)
000000000
(14,0,0)
000000000
PIGEONS & DOVES
Count TotalVentura RiverLake CasitasOjaiCanada LargaWheeler CanyonVenturaSCREPacific Ocean
(698,53,326)
22842050001990
(592,20,212)
49004235320052230
101012262236140
(247,0,54)
000000000
(1,0,0)
000000000
000000000
(571,57,245)
852341043230
000000000
CUCKOOS & ROADRUNNERS
Count TotalVentura RiverLake CasitasOjaiCanada LargaWheeler CanyonVenturaSCREPacific Ocean
202000000
BARN OWLS
Count TotalVentura RiverLake CasitasOjaiCanada LargaWheeler CanyonVenturaSCREPacific Ocean
(12,1,5)
101000000
TYPICAL OWLS
Count TotalVentura RiverLake CasitasOjaiCanada LargaWheeler CanyonVenturaSCREPacific Ocean
000000000
(26,1,11)
905100210
000000000
000000000
(3,0,0)
000000000
000000000
(1,0,0)
101000000
GOATSUCKERS
Count TotalVentura RiverLake CasitasOjaiCanada LargaWheeler CanyonVenturaSCREPacific Ocean
000000000
SWIFTS
Count TotalVentura RiverLake CasitasOjaiCanada LargaWheeler CanyonVenturaSCREPacific Ocean
(12,0,0)
000000000
660256403100
HUMMINGBIRDS
Count TotalVentura RiverLake CasitasOjaiCanada LargaWheeler CanyonVenturaSCREPacific Ocean
000000000
(523,85,273)
193127287765580
000000000
000000000
(175,0,23)
990240043500
110000000
000000000
KINGFISHERS
Count TotalVentura RiverLake CasitasOjaiCanada LargaWheeler CanyonVenturaSCREPacific Ocean
(25,2,11)
503010010
WOODPECKERS
Count TotalVentura RiverLake CasitasOjaiCanada LargaWheeler CanyonVenturaSCREPacific Ocean
100100000
(343,26,160)
2304429123204550
000000000
000000000
000000000
101000000
1906351220
38251722910
(22,2,10)
1101101440
(14,0,4)
1422700030
000000000
501912351550
000000000
FALCONS
Count TotalVentura RiverLake CasitasOjaiCanada LargaWheeler CanyonVenturaSCREPacific Ocean
(79,20,42)
2002960120
(11,0,4)
400110110
513000010
(3,0,1)
202000000
TYRANT FLYCATHERS
Count TotalVentura RiverLake CasitasOjaiCanada LargaWheeler CanyonVenturaSCREPacific Ocean
000000000
(1,0,0)
100000100
000000000
000000000
(188,34,128)
120112316912490
000000000
(68,16,42)
490129563140
000000000
000000000
000000000
(46,0,17)
37075001780
SHRIKES
Count TotalVentura RiverLake CasitasOjaiCanada LargaWheeler CanyonVenturaSCREPacific Ocean
(32,0,12)
301110000
VIREOS
Count TotalVentura RiverLake CasitasOjaiCanada LargaWheeler CanyonVenturaSCREPacific Ocean
000000000
000000000
(67,0,9)
821400100
000000000
JAYS, MAGPIES & CROWS
Count TotalVentura RiverLake CasitasOjaiCanada LargaWheeler CanyonVenturaSCREPacific Ocean
(3,0,0)
202000000
(540,59,223)
21612418717213350
(840,49,314)
244253028514301120
(292,39,103)
5948122101670
LARKS
Count TotalVentura RiverLake CasitasOjaiCanada LargaWheeler CanyonVenturaSCREPacific Ocean
(56,0,11)
600000060
SWALLOWS
Count TotalVentura RiverLake CasitasOjaiCanada LargaWheeler CanyonVenturaSCREPacific Ocean
(277,0,54)
820200000620
29029000000
000000000
(19,0,3)
1909000550
000000000
TITMICE
Count TotalVentura RiverLake CasitasOjaiCanada LargaWheeler CanyonVenturaSCREPacific Ocean
000000000
000000000
(138,22,82)
941274958310
BUSHTITS
Count TotalVentura RiverLake CasitasOjaiCanada LargaWheeler CanyonVenturaSCREPacific Ocean
(763,133,486)
33428210481053750
NUTHATCHES
Count TotalVentura RiverLake CasitasOjaiCanada LargaWheeler CanyonVenturaSCREPacific Ocean
000000000
6501227441620
000000000
CREEPERS
Count TotalVentura RiverLake CasitasOjaiCanada LargaWheeler CanyonVenturaSCREPacific Ocean
000000000
WRENS
Count TotalVentura RiverLake CasitasOjaiCanada LargaWheeler CanyonVenturaSCREPacific Ocean
(10,0,3)
100000100
(5,0,1)
201000100
(53,3,16)
1603200830
(3,0,0)
000000000
(35,0,7)
500000050
(55,3,31)
1504501410
THRUSHES & ALLIES
Count TotalVentura RiverLake CasitasOjaiCanada LargaWheeler CanyonVenturaSCREPacific Ocean
380800218100
000000000
(331,59,144)
9901625111216190
(185,19,71)
20010601300
(476,3,148)
2170805540122280
100010000
000000000
000000000
(169,5,44)
4221214003110
(1033,2,232)
132132520624170
(19,0,1)
000000000
MOCKINGBIRDS & THRASHERS
Count TotalVentura RiverLake CasitasOjaiCanada LargaWheeler CanyonVenturaSCREPacific Ocean
(125,7,28)
2208900500
000000000
(122,20,64)
3604594680
STARLINGS
Count TotalVentura RiverLake CasitasOjaiCanada LargaWheeler CanyonVenturaSCREPacific Ocean
(1576,226,619)
2358488743810310
PIPITS
Count TotalVentura RiverLake CasitasOjaiCanada LargaWheeler CanyonVenturaSCREPacific Ocean
000000000
(365,3,130)
169011716000360
WAXWINGS
Count TotalVentura RiverLake CasitasOjaiCanada LargaWheeler CanyonVenturaSCREPacific Ocean
(1010,0,198)
920355000520
SILKY-FLYCATCHERS
Count TotalVentura RiverLake CasitasOjaiCanada LargaWheeler CanyonVenturaSCREPacific Ocean
(40,2,10)
1103620000
WARBLERS
Count TotalVentura RiverLake CasitasOjaiCanada LargaWheeler CanyonVenturaSCREPacific Ocean
000000000
000000000
000000000
000000000
41021209270
000000000
000000000
000000000
(116,17,65)
59090002480
000000000
100000100
(4,0,1)
200001010
(1,0,0)
101000000
793221721092645893300
600000150
000000000
100000010
(79,4,24)
410110015240
000000000
400000040
SPARROWS & ALLIES
Count TotalVentura RiverLake CasitasOjaiCanada LargaWheeler CanyonVenturaSCREPacific Ocean
000000000
(181,10,64)
5611618051330
100000100
(291,68,182)
1815224961155330
(190,0,33)
300300000
000000000
000000000
000000000
000000000
(427,0,76)
16021210100
(321,4,49)
6713292200210
(59,0,7)
1305300140
(274,22,88)
760941010520
(96,2,17)
902100060
000000000
000000000
000000000
(2075,532,1146)
11581727135954951941680
2324700280
(707,129,330)
27904714026137280
000000000
000000000
000000000
TANAGERS
Count TotalVentura RiverLake CasitasOjaiCanada LargaWheeler CanyonVenturaSCREPacific Ocean
(3,0,0)
100000010
(8,0,1)
100000100
GROSBEAKS & BUNTINGS
Count TotalVentura RiverLake CasitasOjaiCanada LargaWheeler CanyonVenturaSCREPacific Ocean
000000000
000000000
000000000
BLACKBIRDS & ALLIES
Count TotalVentura RiverLake CasitasOjaiCanada LargaWheeler CanyonVenturaSCREPacific Ocean
(1987,17,428)
10943744200040
000000000
(659,40,281)
185081143000600
000000000
(3225,191,899)
2002024100080480
31001000300
200000020
(2,0,0)
100000010
000000000
(16,0,3)
100000010
000000000
000000000
FINCHES
Count TotalVentura RiverLake CasitasOjaiCanada LargaWheeler CanyonVenturaSCREPacific Ocean
(2394,195,770)
5362190943024121750
(58,0,12)
18011700000
000000000
000000000
(151,0,21)
404000000
(577,21,179)
149557182028390
000000000
(331,3,90)
610660011380
OLD WORLD SPARROWS & FINCHES
Count TotalVentura RiverLake CasitasOjaiCanada LargaWheeler CanyonVenturaSCREPacific Ocean
(289,29,105)
10300399113410
40038002900
 
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