Ventura Audubon Society
Christmas Bird Counts
(since 1980)
Count Circle & Sectors
Years on Record: 39
Total Species Recorded: 299
Most Species Recorded: 202 (1987)
Least Species Recorded: 156 (1981)
Average Species Recorded: 177
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 39 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
+239%
Greater Scaup
+200%
Hooded Merganser
+356%
Red-throated Loon
+174%
Pacific Loon
+1082%
Western Grebe
+201%
Black-vented Shearwater
+569%
Brandt's Cormorant
+680%
Pelagic Cormorant
+209%
American White Pelican
+4491%
Brown Pelican
+282%
Bald Eagle
+730%
Black Oystercatcher
+718%
Snowy Plover
+419%
Long-billed Curlew
+309%
Marbled Godwit
+174%
Black Turnstone
+126%
Pomarine Jaeger
+163%
Parasitic Jaeger
+188%
Common Murre
+2453%
Rhinoceros Auklet
+983%
Caspian Tern
+108%
Royal Tern
+350%
Eurasian Collared-Dove
+2850%
Western Screech-Owl
+114%
Costa's Hummingbird
+150%
Allen's Hummingbird
+960%
Merlin
+113%
Peregrine Falcon
+250%
American Crow
+132%
Tree Swallow
+113%
Violet-green Swallow
+104%
White-breasted Nuthatch
+112%
Mountain Bluebird
+215%
Great-tailed Grackle
+309%
Trending Down 
(delta as % of avg for first half of count years)
Wood Duck
-55%
Cinnamon Teal
-81%
Northern Pintail
-93%
Green-winged Teal
-60%
Canvasback
-79%
Cattle Egret
-100%
Green Heron
-72%
Sharp-shinned Hawk
-50%
Ferruginous Hawk
-77%
Common Gallinule
-59%
Black-necked Stilt
-86%
American Avocet
-85%
Wandering Tattler
-60%
Dunlin
-95%
Western Sandpiper
-84%
Long-billed Dowitcher
-76%
Wilson's Snipe
-72%
Bonaparte's Gull
-99%
Herring Gull
-80%
Glaucous-winged Gull
-72%
Spotted Dove
-100%
Burrowing Owl
-64%
Prairie Falcon
-56%
Loggerhead Shrike
-70%
Hutton's Vireo
-70%
Horned Lark
-52%
Mountain Chickadee
-90%
Canyon Wren
-57%
Varied Thrush
-77%
Nashville Warbler
-53%
Rufous-crowned Sparrow
-93%
Chipping Sparrow
-52%
Western Tanager
-71%
Brown-headed Cowbird
-71%
Bullock's Oriole
-79%
Uncommon: Recent Abundance (2019)
Rare: Recent Abundance (2019)
Note: Years prior to 1996 have incomplete sector counts.
* Count Day. Not added to total species count (10).
** Count week only. Not added to total species count (0).
*** None found this year (127).
Total Species
click for counts by year
172941107453526813224
SWANS, GEESE & DUCKS
Historical (high,low,avg)
Count TotalVentura RiverLake CasitasOjaiCanada LargaWheeler CanyonVenturaSCREPacific Ocean
000000000
(6,0,1)
100000010
(6,0,1)
000000000
(30,0,1)
000000000
000000000
(344,0,38)
13813123000020
(1,0,0)
101000000
(3,0,0)
000000000
(12,0,1)
000000000
(228,10,106)
184171210400420
000000000
(363,3,157)
215130503500000
(709,40,258)
207663380007030
100000010
(463,3,76)
11000000110
(619,8,135)
21001420000680
(461,0,29)
000000000
(887,7,100)
24019500000
(112,0,20)
000000000
(34,0,3)
000000000
(266,0,25)
100000010
(11,0,2)
101000000
(84,0,24)
1006000040
000000000
000000000
(206,0,61)
1628000004150
760000001
(2,0,0)
000000000
000000000
(103,13,45)
591163000318
000000000
(41,0,10)
14200010020
(63,0,7)
12012000000
17200000123
(753,78,297)
21447800001320
PARTRIDGES, QUAIL, GROUSE & TURKEYS
Count TotalVentura RiverLake CasitasOjaiCanada LargaWheeler CanyonVenturaSCREPacific Ocean
(453,4,167)
276099921513300
(41,0,3)
505000000
LOONS
Count TotalVentura RiverLake CasitasOjaiCanada LargaWheeler CanyonVenturaSCREPacific Ocean
(266,0,46)
16400000012
(553,0,41)
200000002
(105,0,7)
641000001
(41,0,4)
000000000
GREBES
Count TotalVentura RiverLake CasitasOjaiCanada LargaWheeler CanyonVenturaSCREPacific Ocean
(128,15,50)
342100000202
(24,0,6)
200000002
000000000
(341,0,50)
290130000142
(7227,12,1410)
65462550000156501
(349,0,43)
23030000020
(7019,0,1050)
4800480000000
SHEARWATERS & PETRELS
Count TotalVentura RiverLake CasitasOjaiCanada LargaWheeler CanyonVenturaSCREPacific Ocean
000000000
000000000
000000000
000000000
000000000
000000000
000000000
000000000
CORMORANTS
Count TotalVentura RiverLake CasitasOjaiCanada LargaWheeler CanyonVenturaSCREPacific Ocean
(670,0,54)
38300000035
9118400005415
1070000003
PELICANS & BOOBIES
Count TotalVentura RiverLake CasitasOjaiCanada LargaWheeler CanyonVenturaSCREPacific Ocean
18000000180
(1235,3,329)
898000003843
BITTERNS & HERONS
Count TotalVentura RiverLake CasitasOjaiCanada LargaWheeler CanyonVenturaSCREPacific Ocean
000000000
(90,19,46)
56481012400
(57,3,22)
2257200080
(154,8,32)
22140200150
000000000
(30,0,5)
000000000
(19,0,4)
200010010
74320000690
500000050
IBISES & SPOONBILLS
Count TotalVentura RiverLake CasitasOjaiCanada LargaWheeler CanyonVenturaSCREPacific Ocean
(26,0,2)
700000070
AMERICAN VULTURES
Count TotalVentura RiverLake CasitasOjaiCanada LargaWheeler CanyonVenturaSCREPacific Ocean
(232,0,112)
2323470501479480
KITES, EAGLES & HAWKS
Count TotalVentura RiverLake CasitasOjaiCanada LargaWheeler CanyonVenturaSCREPacific Ocean
(7,1,3)
611000031
905001030
(3,0,1)
202000000
(25,3,9)
1805241060
401100020
(25,3,10)
2506516430
201100000
33161416320
000000000
(118,43,85)
1176222821125230
000000000
100001000
(3,0,1)
000000000
RAILS & COOTS
Count TotalVentura RiverLake CasitasOjaiCanada LargaWheeler CanyonVenturaSCREPacific Ocean
(6,0,1)
100000010
(17,0,4)
300000030
100000010
(2654,313,1081)
7283352874401520
CRANES
Count TotalVentura RiverLake CasitasOjaiCanada LargaWheeler CanyonVenturaSCREPacific Ocean
000000000
STILTS & AVOCETS
Count TotalVentura RiverLake CasitasOjaiCanada LargaWheeler CanyonVenturaSCREPacific Ocean
000000000
(214,0,24)
101000000
OYSTERCATCHERS
Count TotalVentura RiverLake CasitasOjaiCanada LargaWheeler CanyonVenturaSCREPacific Ocean
100000010
400000040
(401,18,124)
1035700000460
000000000
PLOVERS
Count TotalVentura RiverLake CasitasOjaiCanada LargaWheeler CanyonVenturaSCREPacific Ocean
(200,0,54)
1106000001040
430000010
(358,42,149)
9401181000650
000000000
SANDPIPERS & PHALAROPES
Count TotalVentura RiverLake CasitasOjaiCanada LargaWheeler CanyonVenturaSCREPacific Ocean
(21,3,12)
15213000000
200000020
(37,0,15)
101000000
(756,18,100)
543100000230
000000000
(23,0,7)
320000010
910010070
(194,0,32)
1230000090
(15,0,6)
15120000030
(45,2,20)
412100000200
(109,0,15)
900000090
(784,76,274)
273121000001520
(40,0,5)
000000000
(250,5,77)
570370000200
000000000
(210,0,22)
200000020
000000000
11011000000
000000000
(56,0,8)
201000010
000000000
000000000
SKUAS & JAEGERS
Count TotalVentura RiverLake CasitasOjaiCanada LargaWheeler CanyonVenturaSCREPacific Ocean
000000000
(10,0,1)
100000001
000000000
AUKS, MURRES & PUFFINS
Count TotalVentura RiverLake CasitasOjaiCanada LargaWheeler CanyonVenturaSCREPacific Ocean
(100,0,6)
000000000
000000000
000000000
000000000
000000000
GULLS & TERNS
Count TotalVentura RiverLake CasitasOjaiCanada LargaWheeler CanyonVenturaSCREPacific Ocean
000000000
(900,0,125)
000000000
000000000
(926,17,202)
321400000711
(1336,13,298)
98980000000
(1362,75,339)
49018615006032170
(6108,60,1057)
5424400005243250
(2164,35,483)
9811230003363600
(517,0,26)
100000010
000000000
300000030
000000000
000000000
(2105,0,194)
2150000002150
(6,0,1)
000000000
(258,0,38)
000000000
(40,0,9)
1450000063
(16,0,1)
000000000
(15,0,1)
100000010
(14,0,0)
000000000
PIGEONS & DOVES
Count TotalVentura RiverLake CasitasOjaiCanada LargaWheeler CanyonVenturaSCREPacific Ocean
(698,53,329)
30141111300081110
(592,20,198)
120028450311330
32845949159260490
(247,0,58)
000000000
(1,0,0)
000000000
000000000
(571,57,250)
2060454652321390
200002000
CUCKOOS & ROADRUNNERS
Count TotalVentura RiverLake CasitasOjaiCanada LargaWheeler CanyonVenturaSCREPacific Ocean
101000000
BARN OWLS
Count TotalVentura RiverLake CasitasOjaiCanada LargaWheeler CanyonVenturaSCREPacific Ocean
(12,1,4)
1005102200
TYPICAL OWLS
Count TotalVentura RiverLake CasitasOjaiCanada LargaWheeler CanyonVenturaSCREPacific Ocean
1005300200
(21,1,10)
1707300430
000000000
(7,0,1)
101000000
(3,0,0)
000000000
000000000
000000000
GOATSUCKERS
Count TotalVentura RiverLake CasitasOjaiCanada LargaWheeler CanyonVenturaSCREPacific Ocean
000000000
SWIFTS
Count TotalVentura RiverLake CasitasOjaiCanada LargaWheeler CanyonVenturaSCREPacific Ocean
(12,0,0)
000000000
17017000000
HUMMINGBIRDS
Count TotalVentura RiverLake CasitasOjaiCanada LargaWheeler CanyonVenturaSCREPacific Ocean
000000000
(523,85,269)
2351616254687810
200000110
000000000
(175,0,16)
687130042150
82000000820
000000000
KINGFISHERS
Count TotalVentura RiverLake CasitasOjaiCanada LargaWheeler CanyonVenturaSCREPacific Ocean
(25,2,12)
511000030
WOODPECKERS
Count TotalVentura RiverLake CasitasOjaiCanada LargaWheeler CanyonVenturaSCREPacific Ocean
000000000
(343,26,153)
213053899273320
000000000
000000000
201100000
000000000
1603620410
472101875410
(19,2,10)
1620100940
812010130
000000000
625912931680
100100000
FALCONS
Count TotalVentura RiverLake CasitasOjaiCanada LargaWheeler CanyonVenturaSCREPacific Ocean
(79,20,43)
430108171160
(11,0,4)
811210030
601002030
000000000
TYRANT FLYCATHERS
Count TotalVentura RiverLake CasitasOjaiCanada LargaWheeler CanyonVenturaSCREPacific Ocean
000000000
000000000
000000000
000000000
(188,34,127)
12717211318211450
000000000
(64,16,41)
45286712190
000000000
000000000
(38,0,15)
2013400660
SHRIKES
Count TotalVentura RiverLake CasitasOjaiCanada LargaWheeler CanyonVenturaSCREPacific Ocean
(32,0,12)
1103140030
VIREOS
Count TotalVentura RiverLake CasitasOjaiCanada LargaWheeler CanyonVenturaSCREPacific Ocean
000000000
000000000
(67,0,9)
300200010
000000000
JAYS, MAGPIES & CROWS
Count TotalVentura RiverLake CasitasOjaiCanada LargaWheeler CanyonVenturaSCREPacific Ocean
000000000
(540,59,223)
19963858241937170
(840,49,304)
685110501171714802970
(292,39,102)
8129171228850
LARKS
Count TotalVentura RiverLake CasitasOjaiCanada LargaWheeler CanyonVenturaSCREPacific Ocean
(56,0,12)
200000020
SWALLOWS
Count TotalVentura RiverLake CasitasOjaiCanada LargaWheeler CanyonVenturaSCREPacific Ocean
(277,0,53)
960500000460
26026000000
000000000
(18,0,2)
000000000
(103,0,4)
100000010
TITMICE
Count TotalVentura RiverLake CasitasOjaiCanada LargaWheeler CanyonVenturaSCREPacific Ocean
000000000
(138,22,80)
11922569513500
BUSHTITS
Count TotalVentura RiverLake CasitasOjaiCanada LargaWheeler CanyonVenturaSCREPacific Ocean
(763,133,490)
59460252410171151360
NUTHATCHES
Count TotalVentura RiverLake CasitasOjaiCanada LargaWheeler CanyonVenturaSCREPacific Ocean
000000000
560122905910
000000000
CREEPERS
Count TotalVentura RiverLake CasitasOjaiCanada LargaWheeler CanyonVenturaSCREPacific Ocean
000000000
WRENS
Count TotalVentura RiverLake CasitasOjaiCanada LargaWheeler CanyonVenturaSCREPacific Ocean
(10,0,3)
101000000
(5,0,1)
100000100
(53,3,16)
2210123960
(3,0,0)
000000000
(35,0,7)
801000070
(55,3,31)
2915632570
THRUSHES & ALLIES
Count TotalVentura RiverLake CasitasOjaiCanada LargaWheeler CanyonVenturaSCREPacific Ocean
436800116120
000000000
(331,59,145)
14815121611142510
(185,19,75)
351151013230
(476,3,137)
256173391350530
000000000
000000000
000000000
(169,5,44)
8891135159180
(1033,2,238)
42623705815482210
(19,0,1)
000000000
MOCKINGBIRDS & THRASHERS
Count TotalVentura RiverLake CasitasOjaiCanada LargaWheeler CanyonVenturaSCREPacific Ocean
(125,7,29)
35491610500
000000000
(122,20,65)
802929976180
STARLINGS
Count TotalVentura RiverLake CasitasOjaiCanada LargaWheeler CanyonVenturaSCREPacific Ocean
(1576,226,629)
4891855040285930970
PIPITS
Count TotalVentura RiverLake CasitasOjaiCanada LargaWheeler CanyonVenturaSCREPacific Ocean
000000000
(365,3,130)
31220045180
WAXWINGS
Count TotalVentura RiverLake CasitasOjaiCanada LargaWheeler CanyonVenturaSCREPacific Ocean
(1010,0,201)
156107400012600
SILKY-FLYCATCHERS
Count TotalVentura RiverLake CasitasOjaiCanada LargaWheeler CanyonVenturaSCREPacific Ocean
(40,2,10)
200100100
WARBLERS
Count TotalVentura RiverLake CasitasOjaiCanada LargaWheeler CanyonVenturaSCREPacific Ocean
000000000
000000000
000000000
000000000
758001017490
000000000
000000000
(116,17,66)
8291120017430
000000000
(4,0,1)
100000010
(1,0,0)
000000000
76173896234381133520
100000010
000000000
000000000
(71,4,21)
32002009210
000000000
200000020
SPARROWS & ALLIES
Count TotalVentura RiverLake CasitasOjaiCanada LargaWheeler CanyonVenturaSCREPacific Ocean
000000000
(181,10,63)
849933161880
000000000
(291,68,180)
222122449262249400
(190,0,35)
000000000
000000000
000000000
000000000
(427,0,78)
4401101914000
(321,4,50)
29016400090
(59,0,7)
1100900200
(274,22,88)
9751650027440
(96,2,17)
1813210470
000000000
201000100
000000000
(2075,532,1133)
14692241653075903144000
901320142019220
(707,129,331)
373350153122163710
000000000
000000000
000000000
TANAGERS
Count TotalVentura RiverLake CasitasOjaiCanada LargaWheeler CanyonVenturaSCREPacific Ocean
(2,0,0)
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
(1987,17,435)
16357000150730
100000010
(659,40,290)
197144745600760
000000000
(3225,191,947)
352115119162300700
901900000710
361000100250
000000000
000000000
(16,0,3)
100000010
000000000
000000000
FINCHES
Count TotalVentura RiverLake CasitasOjaiCanada LargaWheeler CanyonVenturaSCREPacific Ocean
(2394,195,774)
9225295156981242101870
(58,0,12)
602400000
000000000
000000000
(140,0,18)
000000000
(335,21,169)
19231610241443100
000000000
(331,3,93)
27121301640
OLD WORLD SPARROWS & FINCHES
Count TotalVentura RiverLake CasitasOjaiCanada LargaWheeler CanyonVenturaSCREPacific Ocean
(289,29,103)
1631712122449670
000000000
 
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