ABC's Bird Library

Search our 400+ comprehensive bird species profiles to learn about the natural history and conservation issues facing birds throughout the Americas.

Blue-throated macaws flying

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LeConte’s Sparrow by Brandon Caswell, Macaulay Library at the Cornell Lab of Ornithology
LeConte's Sparrow
  • Population: 5.2 million
  • Trend:  Decreasing
Zone-tailed Hawk by Ryan Sanderson, Macaulay Library at the Cornell Lab of Ornithology
Zone-tailed Hawk
  • Population: 2 million
  • Trend:  Stable
Black Vulture by Artush, Shutterstock
Black Vulture
  • Population: 1.2 million
  • Trend:  Increasing
Common Poorwill by Liam Hutcheson, Macaulay Library at the Cornell Lab of Ornithology
Common Poorwill
  • Population: 1.4 million
  • Trend:  Decreasing
Upland Sandpiper by Michael J. Parr
Upland Sandpiper
  • Population: 750,000
  • Trend:  Increasing
Rock Wren by Aiden Brubaker, Macaulay Library at the Cornell Lab of Ornithology
Rock Wren
  • Population: 4.1 million
  • Trend:  Decreasing
Southern Lapwing by Greg Homel, Natural Elements Productions
Southern Lapwing
  • Population: 5–50 million
  • Trend:  Increasing
Sharp-shinned Hawk by Jerry Liguori, Macaulay Library at the Cornell Lab of Ornithology
Sharp-shinned Hawk
  • Population: 440,000
  • Trend:  Stable
Bachman's Sparrow by Sam Zhang, Macaulay Library at the Cornell Lab of Ornithology
Bachman's Sparrow
  • Population: 190,000
  • Trend:  Decreasing
Parkinson's (Black) Petrel by Timothy Paasila, Macaulay Library at the Cornell Lab of Ornithology
Parkinson's Petrel
  • Population: 5,500
  • Trend:  Stable
Rhinceros Auklet by Robert L. Kothenbeutel, Shutterstock.
Rhinoceros Auklet
  • Population: 2-3 million (global), 1.5 million (North America)
  • Trend:  Decreasing
Black-vented Shearwater by Mel Senac, Macaulay Library at the Cornell Lab of Ornithology
Black-vented Shearwater
  • Population: 200,000 – 300,000
  • Trend:  Stable
Dovekie by Nick Pecker, Shutterstock
Dovekie
  • Population: Approximately 24 to 50 million
  • Trend:  Unknown, may be decreasing
Brown Noddies by Neil Bowman, Shutterstock
Brown Noddy
  • Population: 800,000 - 1.4 million
  • Trend:  Stable
Bonin Petrel by Eric Vanderwerf, Macaulay Library at the Cornell Lab of Ornithology
Bonin Petrel (Nunulu)
  • Population: 995,000
  • Trend:  Decreasing
Crested Eagle by Victor Castanho, Macaulay Library at the Cornell Lab of Ornithology
Crested Eagle
  • Population: Unknown
  • Trend:  Probably decreasing, based on trends in forest loss within its range
Red-billed Tropicbird Photo by Meghan Cassody, CC By SA 4.0
Red-tailed Tropicbird (Koaʻeʻula)
  • Population: Approx. 70,000 (World); with about 24,000 in the Hawaiian Islands.
  • Trend:  Decreasing
Guadalupe Murrelet by Mel Seanc, Macaulay Library at the Cornell Lab of Ornithology
Guadalupe Murrelet
  • Population: 5,000 mature individuals
  • Trend:  Decreasing
Arctic Tern by Arto Hakola, Shutterstock
Arctic Tern
  • Population: 2 million (global); approx. 800,000 (North America)
  • Trend:  Decreasing
Black-crowned Night Heron by Tim Drake Photography, Shutterstock
Black-crowned Night Heron
  • Population: 3 million (global); 100,000 (North America)
  • Trend:  Decreasing

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Eastern Bluebird, Jesse Nguyen/Shutterstock
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