1 / 37

Central Valley Grasslands: California’s Highest Conservation Priority?

Central Valley Grasslands: California’s Highest Conservation Priority?. How are the birds associated with these CV habitats doing?. Data Sources for Avian Population Trends. Christmas Bird Count (CBC) Over 2000 15-mile diameter circles across N. America More than 100 years of data.

kendall
Download Presentation

Central Valley Grasslands: California’s Highest Conservation Priority?

An Image/Link below is provided (as is) to download presentation Download Policy: Content on the Website is provided to you AS IS for your information and personal use and may not be sold / licensed / shared on other websites without getting consent from its author. Content is provided to you AS IS for your information and personal use only. Download presentation by click this link. While downloading, if for some reason you are not able to download a presentation, the publisher may have deleted the file from their server. During download, if you can't get a presentation, the file might be deleted by the publisher.

E N D

Presentation Transcript

  1. Central Valley Grasslands: California’s Highest Conservation Priority?

  2. How are the birds associated with these CV habitats doing?

  3. Data Sources for Avian Population Trends • Christmas Bird Count (CBC) • Over 2000 15-mile diameter circles across N. America • More than 100 years of data

  4. Data Sources for Avian Population Trends • Christmas Bird Count (CBC) • Over 2000 15-mile diameter circles across N. America • More than 100 years of data • Breeding Bird Survey (BBS) • Over 4100 25-mile roadside routes • More than 40 years of data

  5. WATERBIRDS: waterfowl, shorebirds, herons, etc.

  6. Swans, Geese and Dabbling Ducks 10 Species analyzed: Tundra Swan, Greater White-fronted Goose, Snow Goose, Ross’s Goose, Wood Duck, Mallard, Cinnamon Teal, Northern Shoveler, Northern Pintail, Green-winged Teal • +++ increasing trend, P<0.001 • ++ increasing trend, P<0.01 • + increasing trend, P<0.05 • - - - decreasing trend, P<0.001 • - - decreasing trend, P<0.01 • - decreasing trend, P<0.05

  7. Diving Ducks 9 Species analyzed: Canvasback, Ring-necked Duck, Lesser Scaup, Bufflehead, Hooded Merganser, Common Merganser, Ruddy Duck

  8. Trends from CV CBC data (1976-2010)

  9. Shorebirds 7 Species analyzed: Black-necked Stilt, American Avocet, Greater Yellowlegs, Long-billed Curlew, Dunlin, Least Sandpiper, Long-billed Dowitcher

  10. Herons and other waterbirds 12 Species analyzed: American Bittern, Great Blue Heron, Great Egret, Snowy Egret, Cattle Egret, Green Heron, Black-crowned Night-Heron, White-faced Ibis, Pied-billed Grebe, Eared Grebe, Western/Clark’s Grebe, American Coot

  11. Trends from CV CBC data (1976-2010)

  12. RIPARIAN/WOODLAND BIRDS

  13. Riparian/Woodland Birds 21 Species analyzed: Red-shouldered Hawk, Cooper’s/Sharp-shinned Hawk, Nuttall’s Woodpecker, Downy Woodpecker, Northern Flicker, Hutton’s Vireo, Oak Titmouse, Bushtit, White-breasted Nuthatch, Bewick’s Wren, House Wren, Ruby-crowned Kinglet, Hermit Thrush, Yellow-rumped Warbler, Spotted Towhee, California Towhee, Fox Sparrow, Song Sparrow, Lincoln’s Sparrow, White-crowned Sparrow, Golden-crowned Sparrow

  14. Trends from CV CBC data (1976-2010)

  15. GRASSLAND BIRDS

  16. Grassland Birds 14 Species analyzed: Ferruginous Hawk, Rough-legged Hawk, Golden Eagle, American Kestrel, Prairie Falcon, Killdeer, Say’s Phoebe, Loggerhead Shrike, Horned Lark, Western Bluebird, American Pipit, Lark Sparrow, Savannah Sparrow, Western Meadowlark

  17. Trends from CV CBC data (1976-2010)

  18. Trends from CV BBS data (1966-2006)

  19. How important is the CV to the grassland species in decline?

  20. Grassland Birds 14 Species analyzed: Ferruginous Hawk, Rough-legged Hawk, Golden Eagle, American Kestrel, Prairie Falcon, Killdeer, Say’s Phoebe, Loggerhead Shrike, Horned Lark, Western Bluebird, American Pipit, Lark Sparrow, Savannah Sparrow, Western Meadowlark

  21. American Kestrel Zach Smith

  22. CV = 6% of total

  23. Prairie Falcon Phil Robertson

  24. CV = 8% of total

  25. Loggerhead Shrike P. LaTourrette

  26. CV = 4% of total

  27. American Pipit J. Ferrante

  28. CV = 19% of total

  29. Lark Sparrow T. Roach

  30. CV = 27% of total

  31. Western Meadowlark US FWS

  32. CV = 36% of total

  33. California’s Central Valley supports the highest abundance and diversity of wintering raptors in the country.

  34. Highest Winter Raptor Abundance

  35. Highest Winter Raptor Abundance

  36. Highest Winter Raptor Abundance

  37. High Winter Raptor Species Richness

More Related