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Loess Bluffs National Wildlife Refuge Spring Waterfowl Migration Image #0180 Mandatory Credit: Dale Grosbach - Hills and Skies Photography

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Loess Bluffs National Wildlife Refuge Spring Waterfowl Migration Image #0117 Mandatory Credit: Dale Grosbach - Hills and Skies Photography

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Loess Bluffs National Wildlife Refuge Spring Waterfowl Migration Image #0210 Mandatory Credit: Dale Grosbach - Hills and Skies Photography

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Loess Bluffs National Wildlife Refuge Spring Waterfowl Migration Image #0232 Mandatory Credit: Dale Grosbach - Hills and Skies Photography

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Loess Bluffs National Wildlife Refuge Spring Waterfowl Migration Image #0232 Mandatory Credit: Dale Grosbach - Hills and Skies Photography

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Loess Bluffs National Wildlife Refuge Spring Waterfowl Migration Image #0241 Mandatory Credit: Dale Grosbach - Hills and Skies Photography

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Loess Bluffs National Wildlife Refuge Spring Waterfowl Migration Image #0256 Mandatory Credit: Dale Grosbach - Hills and Skies Photography

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Loess Bluffs National Wildlife Refuge Spring Waterfowl Migration Image #0352 Mandatory Credit: Dale Grosbach - Hills and Skies Photography

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Loess Bluffs National Wildlife Refuge Spring Waterfowl Migration Image #0369 Mandatory Credit: Dale Grosbach - Hills and Skies Photography

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Loess Bluffs National Wildlife Refuge Spring Waterfowl Migration Image #0371 Mandatory Credit: Dale Grosbach - Hills and Skies Photography

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Loess Bluffs National Wildlife Refuge Spring Waterfowl Migration Image #0380 Mandatory Credit: Dale Grosbach - Hills and Skies Photography

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Loess Bluffs National Wildlife Refuge Spring Waterfowl Migration Image #0383 Mandatory Credit: Dale Grosbach - Hills and Skies Photography

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Loess Bluffs National Wildlife Refuge Spring Waterfowl Migration Image #0408 Mandatory Credit: Dale Grosbach - Hills and Skies Photography

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Loess Bluffs National Wildlife Refuge Spring Waterfowl Migration Image #0410 Mandatory Credit: Dale Grosbach - Hills and Skies Photography

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Loess Bluffs National Wildlife Refuge Spring Waterfowl Migration Image #0459 Mandatory Credit: Dale Grosbach - Hills and Skies Photography

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Loess Bluffs National Wildlife Refuge Spring Waterfowl Migration Image #0484 Mandatory Credit: Dale Grosbach - Hills and Skies Photography

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Loess Bluffs National Wildlife Refuge Spring Waterfowl Migration Image #0491 Mandatory Credit: Dale Grosbach - Hills and Skies Photography

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Loess Bluffs National Wildlife Refuge Spring Waterfowl Migration Image #0511 Mandatory Credit: Dale Grosbach - Hills and Skies Photography

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Loess Bluffs National Wildlife Refuge Spring Waterfowl Migration Image #0516 Mandatory Credit: Dale Grosbach - Hills and Skies Photography

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Loess Bluffs National Wildlife Refuge Spring Waterfowl Migration Image #0521 Mandatory Credit: Dale Grosbach - Hills and Skies Photography

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Loess Bluffs National Wildlife Refuge Spring Waterfowl Migration Image #0526 Mandatory Credit: Dale Grosbach - Hills and Skies Photography

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Loess Bluffs National Wildlife Refuge Spring Waterfowl Migration Image #0528 Mandatory Credit: Dale Grosbach - Hills and Skies Photography

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Loess Bluffs National Wildlife Refuge Spring Waterfowl Migration Image #0542 Mandatory Credit: Dale Grosbach - Hills and Skies Photography

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Loess Bluffs National Wildlife Refuge Spring Waterfowl Migration Image #0552 Mandatory Credit: Dale Grosbach - Hills and Skies Photography