Ring-Billed Gull, Everglades National Park, Florida
Kings Mountain National Military Park
56 Ring-Billed Gull Everglades National Park
Pelican and ring-billed gull, January 1978
Biscayne National Park; National Park Service
Pelican and ring-billed gull.
1978-01
The Bull Ring and Bridge of Isabella II--West From the Cathedral Tower, Seville, Spain [recto]
Carl Sandburg Home National Historic Site
Analyses of Great Smoky Mountain Red Spruce Tree Ring Data
Great Smoky Mountains National Park; National Park Service
Billed gull, Pennekamp ring, December 17, 1983
Biscayne National Park; National Park Service
Billed gull, Pennekamp ring.
Billed gull, Pennekamp ring, December 17, 1983
Biscayne National Park; National Park Service
Billed gull, Pennekamp ring.
Billed gull, Pennekamp ring, December 17, 1983
Biscayne National Park; National Park Service
Billed gull, Pennekamp ring.
Billed gull, Pennekamp ring, December 17, 1983
Biscayne National Park; National Park Service
Billed gull, Pennekamp ring.
Billed gull, Pennekamp ring, December 17, 1983
Biscayne National Park; National Park Service
Billed gull, Pennekamp ring.
Men observing the tree rings, Congaree National Park, South Carolina
Congaree National Park
Forestry, close up of cross section rings to show retarded growth past 9 years, tree No. 89 over cabin 10, 1938
Mammoth Cave National Park; National Park Service
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