winter marsh waterfowl migration gathering |
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| navigate by keyword : avian background biology bird birding birds circadian cold conservation covered cycle distance distant dry ducks ecology feathered flap flight flock flocking flying form formation frost frozen gamebirds gathering geese goose grasses ground group habit hill hills klamath lake lower marsh migrate migrates migration migratory move national ornithology pattern reeds reflection refuge resting rhythm season seasonal shape shine silhouette silhouettes sky snow soar teamwork tule tules vast waterfowl wetland wetlands wild wildlife winged wings winter wonder |
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| Tule marsh grasses covered in frost with geese and ducks flying through the sky and resting on the ground during the winter migration at the wetlands of Lower Klamath National Wildlife Refuge. |
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