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Ixoreus naevius

(Gmelin, 1789)

Varied Thrush

G5Secure Found in 134 roadless areas NatureServe Explorer →
G5SecureGlobal Rank
Least concernIUCN
Identity
Unique IDELEMENT_GLOBAL.2.104668
Element CodeABPBJ22010
Record TypeSPECIES
ClassificationSpecies
Classification StatusStandard
Name CategoryVertebrate Animal
IUCNLeast concern
Endemicoccurs (regularly, as a native taxon) in multiple nations
KingdomAnimalia
PhylumCraniata
ClassAves
OrderPasseriformes
FamilyTurdidae
GenusIxoreus
Other Common Names
Grive à collier (FR) Mirlo Pecho Cinchado (ES) varied thrush (EN)
Concept Reference
American Ornithologists' Union (AOU). 1998. Check-list of North American birds. Seventh edition. American Ornithologists' Union, Washington, D.C. [as modified by subsequent supplements and corrections published in The Auk]. Also available online: http://www.aou.org/.
Taxonomic Comments
Sometimes known as Zoothera naevia.
Conservation Status
Rank MethodExpertise without calculation
Review Date2016-04-08
Change Date1996-12-03
Range Extent Comments
BREEDING: northern and western Alaska south through western Canada, northwestern Montana, northern Idaho, Washington, and most of Oregon to extreme northwestern California. NON-BREEDING: southern Alaska, southern British Columbia and northern Idaho south through Washington, Oregon, and California to northern Baja Calif. Wanders widely in central and northeastern North America (AOU 1983).
Ecology & Habitat

Habitat

Humid coastal and interior montane coniferous forest, deciduous forest with dense understory, and tall shrubs (especially alder); in migration and winter also open woodland and chaparral (AOU 1983). BREEDING: Usually nests in a small conifer, sometimes a deciduous tree, 3-4.5 m above ground.

Reproduction

Clutch size 2-5 (usually 3-4). Incubation about 14 days. Nestlings altricial.
Terrestrial Habitats
Forest - HardwoodForest - ConiferForest - MixedWoodland - HardwoodWoodland - ConiferWoodland - MixedShrubland/chaparral
Other Nations (2)
CanadaN5B,NUN
ProvinceRankNative
Yukon TerritoryS5BYes
AlbertaS5B,SUNYes
Northwest TerritoriesSUYes
OntarioSNAYes
British ColumbiaS5Yes
United StatesN5
ProvinceRankNative
UtahSNAYes
IdahoS4Yes
MontanaS3BYes
AlaskaS5BYes
ArizonaS1NYes
New YorkSNRNYes
OregonS4Yes
South DakotaSNAYes
ColoradoSNAYes
MinnesotaSNRNYes
New JerseySNAYes
NevadaSNAYes
WashingtonS5B,S5NYes
WyomingSNAYes
IowaS2NYes
NebraskaSNRNYes
WisconsinSNAYes
CaliforniaSNRYes
Roadless Areas (134)
Alaska (49)
AreaForestAcres
AnanTongass National Forest36,666
Behm IslandsTongass National Forest4,777
Boston BarChugach National Forest53,617
Brabazon AdditionTongass National Forest498,819
ChichagofTongass National Forest555,858
Chilkat-West Lynn CanalTongass National Forest199,772
Chugach-12Chugach National Forest8,116
Chugach-13Chugach National Forest13,337
College FiordChugach National Forest1,130,818
Copper River WetlandsChugach National Forest85,972
Douglas IslandTongass National Forest28,065
Fidalgo-GravinaChugach National Forest257,968
Five MileTongass National Forest19,459
Freshwater BayTongass National Forest44,933
Game CreekTongass National Forest54,469
GravinaTongass National Forest37,381
HardingTongass National Forest174,349
Hoonah SoundTongass National Forest79,764
HyderTongass National Forest121,723
Johnson PassChugach National Forest152,508
Juneau UrbanTongass National Forest101,581
Juneau-Skagway IcefieldTongass National Forest1,187,268
KartaTongass National Forest52,117
Kenai LakeChugach National Forest213,172
Kenai MountainsChugach National Forest306,600
LindenbergTongass National Forest25,855
MadanTongass National Forest68,553
Mansfield PeninsulaTongass National Forest54,991
Middle KruzofTongass National Forest14,724
Nellie JuanChugach National Forest713,697
North BaranofTongass National Forest314,089
North EtolinTongass National Forest40,993
North KruzofTongass National Forest33,146
North KupreanofTongass National Forest114,660
North RevillaTongass National Forest215,430
North WrangellTongass National Forest8,091
Pavlof-East PointTongass National Forest5,399
RedoubtTongass National Forest68,347
ResurrectionChugach National Forest224,615
RevillaTongass National Forest29,298
RhineTongass National Forest23,010
Roaded DonutChugach National Forest968
Sheridan GlacierChugach National Forest224,683
Sitka UrbanTongass National Forest112,003
Soda BayTongass National Forest78,091
Taku-SnettishamTongass National Forest664,928
Twenty MileChugach National Forest198,775
Upper SitukTongass National Forest16,789
Yakutat ForelandsTongass National Forest323,648
California (8)
AreaForestAcres
Black ButteMendocino National Forest15,461
Cutca ValleyCleveland National Forest14,530
De La GuerraLos Padres National Forest5,418
GrindstoneMendocino National Forest26,031
North MountainStanislaus National Forest7,856
Orleans Mtn. CSix Rivers National Forest15,589
Snow MountainMendocino National Forest14,457
Weaver BallyShasta-Trinity National Forest829
Colorado (1)
AreaForestAcres
Long ParkRoutt NF42,100
Montana (8)
AreaForestAcres
Cherry PeakLolo National Forest37,862
Evans GulchLolo National Forest8,059
Maple PeakLolo National Forest6,469
Marston Face # 172Kootenai National Forest9,098
Reservation DivideLolo National Forest16,908
Scotchman Peaks (MT)Kootenai National Forest53,909
Ten Lakes #683Kootenai National Forest48,545
Thompson Seton #483Kootenai National Forest29,379
Oregon (29)
AreaForestAcres
Badger CreekMt. Hood National Forest847
Bull Of The WoodsMt. Hood National Forest8,843
Drift CreekSiuslaw National Forest6,333
EagleMt. Hood National Forest16,841
Echo MountainWillamette National Forest8,098
French Pete (a)Willamette National Forest1,668
Hardesty MountainWillamette National Forest3,754
Hardesty MountainUmpqua National Forest2,597
Hebo 1aSiuslaw National Forest13,930
HellholeUmatilla National Forest65,679
LakeMt. Hood National Forest1,327
LarchMt. Hood National Forest12,961
Maiden PeakDeschutes National Forest26,432
Maiden PeakWillamette National Forest9,627
Mt. JeffersonDeschutes National Forest2,282
Mt. BaileyUmpqua National Forest18,401
Mt. Hood AdditionsMt. Hood National Forest13,061
Opal CreekWillamette National Forest5,417
Roaring RiverMt. Hood National Forest27,316
Salmon - HuckleberryMt. Hood National Forest17,570
TahkenitchSiuslaw National Forest5,799
TenmileSiuslaw National Forest10,818
Twin LakesMt. Hood National Forest6,055
Twin MountainWallowa-Whitman National Forest58,533
Upper Catherine CreekWallowa-Whitman National Forest6,446
Waldo - FujiWillamette National Forest15,273
Waldo - LakeWillamette National Forest2,993
Wind CreekMt. Hood National Forest5,438
WoahinkSiuslaw National Forest5,309
Utah (2)
AreaForestAcres
Mt. Logan NorthWasatch-Cache National Forest18,930
Mt. NaomiWasatch-Cache National Forest41,922
Washington (37)
AreaForestAcres
Alpine Lakes Adj.Wenatchee National Forest57,104
Big Lava BedGifford Pinchot National Forest19,043
Boulder RiverMt Baker-Snoqualmie National Forest32,563
Dark DivideGifford Pinchot National Forest52,483
Eagle RockMt Baker-Snoqualmie National Forest34,064
Glacier Peak BMt Baker-Snoqualmie National Forest19,328
Glacier Peak JMt Baker-Snoqualmie National Forest26,482
Glacier Peak KMt Baker-Snoqualmie National Forest47,269
Glacier Peak LMt Baker-Snoqualmie National Forest14,084
Goat Rocks AdjWenatchee National Forest6,108
Green MountainOlympic National Forest4,617
Heather LakeWenatchee National Forest10,628
HorseshoeGifford Pinchot National Forest7,579
Jefferson RidgeOlympic National Forest6,512
Jupiter RidgeOlympic National Forest10,148
Liberty BellOkanogan National Forest108,495
LightningOlympic National Forest7,179
ManastashWenatchee National Forest11,155
Mt. Baker MaMt Baker-Snoqualmie National Forest24,847
Mt. Baker Noisy - DiobsudMt Baker-Snoqualmie National Forest56,039
Mt. Baker NorthMt Baker-Snoqualmie National Forest16,873
Mt. Baker WestMt Baker-Snoqualmie National Forest25,390
Mt. BaldyOlympic National Forest3,557
Norse PeakWenatchee National Forest10,169
Pasayten RimOkanogan National Forest17,074
PompeyGifford Pinchot National Forest23,985
QuilceneOlympic National Forest18,656
Rugged RidgeOlympic National Forest4,358
Salmo - Priest BColville National Forest11,869
SawtoothOkanogan National Forest122,194
Silver StarGifford Pinchot National Forest7,779
SiouxonGifford Pinchot National Forest12,773
South QuinaultOlympic National Forest11,081
TaneumWenatchee National Forest26,140
TeanawayWenatchee National Forest72,849
Thorp Mtn.Wenatchee National Forest22,717
TumwaterGifford Pinchot National Forest8,676
References (18)
  1. American Ornithologists' Union (AOU). 1983. Check-list of North American Birds, 6th edition. Allen Press, Inc., Lawrence, Kansas. 877 pp.
  2. American Ornithologists' Union (AOU). 1998. Check-list of North American birds. Seventh edition. American Ornithologists' Union, Washington, D.C. [as modified by subsequent supplements and corrections published in <i>The Auk</i>]. Also available online: http://www.aou.org/.
  3. Balda, R. P., and G. C. Bateman. 1971. Flocking and annual cycle of the piñon jay, <i>Gymnorhinus cyanocephalus</i>. Condor 73:287-302.
  4. BirdLife International. 2004b. Threatened birds of the world 2004. CD ROM. BirdLife International, Cambridge, UK.
  5. Godfrey, W.E. 1966. The birds of Canada. National Museums of Canada. Ottawa. 428 pp.
  6. Harrison, C. 1978. A Field Guide to the Nests, Eggs and Nestlings of North American Birds. Collins, Cleveland, Ohio.
  7. Horn, H. S. 1968. The adaptive significance of colonial nesting in the Brewer's Blackbird. Ecology 49:682-694.
  8. Howell, S. N. G., and S. Webb. 1995. A guide to the birds of Mexico and northern Central America. Oxford University Press, Oxford, UK.
  9. Ligon, J. D. 1971. Late summer-autumnal breeding of the piñon jay in New Mexico. Condor 73:147-153.
  10. Moore, W. S., and R. A. Dolbeer. 1989. The use of banding recovery data to estimate dispersal rates and gene flow in avian species: case studies in the Red-winged Blackbird and Common Grackle. Condor 91:242-253.
  11. National Geographic Society (NGS). 1983. Field guide to the birds of North America. National Geographic Society, Washington, DC.
  12. Parker III, T. A., D. F. Stotz, and J. W. Fitzpatrick. 1996. Ecological and distributional databases for neotropical birds. The University of Chicago Press, Chicago.
  13. Peterson, R.T. 1990b. A field guide to western birds. Houghton Mifflin Company, Boston.
  14. Tarvin, K. A., and G. E. Woolfenden. 1999. Blue Jay (<i>Cyanocitta cristata</i>). No. 469 IN A. Poole and F. Gill, editors. The birds of North America. The Birds of North America, Inc., Philadelphia, PA. 32pp.
  15. Terres, J. K. 1980. The Audubon Society encyclopedia of North American birds. Alfred A. Knopf, New York.
  16. Thompson, F. R., III. 1994. Temporal and spatial patterns of breeding brown-headed cowbirds in the midwestern United States. Auk 111:979-990.
  17. Williams, L. 1952b. Breeding behavior of the Brewer blackbird. Condor 54:3-47.
  18. Willson, M. F. 1966. Breeding ecology of the Yellow-headed Blackbird. Ecological Monographs 36:51-77.