Marie Read / Black-necked stilts (Himantopus mexicanus) pair performing post-copulatory display (as copulation ends, the male slides off the female leaving his wings draped over her and crossing his bill with hers...

Marie Read / American avocets (Recurvirostra americana) two during aggressive (territorial) encounter, Bear River Migratory Bird Refuge, Utah, USA, May.

Marie Read / Black-necked Stilt (Himantopus mexicanus), foraging in water, with reflection, Bear River Migratory Bird Refuge, Utah, USA, May.

Marie Read / White pelicans (Pelecanus erythrorhynchos) at Bear River Migratory Bird Refuge with an approaching storm in May, Utah, USA, May.

Marie Read / Yellow-headed Blackbird (Xanthocephalus xanthocephalus) male perched in marsh vegetation (Phragmites) in foreground. Bear River Migratory Bird Refuge, view toward east, with Wasatch Mountains in dista...

Marie Read / Cliff Swallow (Petrochelidon pyrrhonota) adult in flight, Bear River Migratory Bird Refuge, Utah, USA, May.

Marie Read / Black-necked sStilt (Himantopus mexicanus) pair building nest in shallow wetland: male in foreground is squatting and pushing backwards with his feet/legs to form a nest scrape in vegetation the pair...

Marie Read / Black-necked Stilt (Himantopus mexicanus) pair building nest in shallow wetland, male in foreground in squatting and pushing backwards with his feet/legs to form a nest scrape in vegetation the pair...

Marie Read / American avocet (Recurvirostra americana) pair performing post-copulatory display (as copulation ends, the male slides off the female leaving his wings draped over her and crossing his bill with hers,...

Marie Read / American Avocet (Recurvirostra americana), pair copulating, Bear River Migratory Bird Refuge, Utah, USA, May.

Marie Read / Western grebe (Aechmophorus occidentalis) adult with chick riding on its back, both napping, Bear River Migratory Bird Refuge, Utah, USA, May.

Marie Read / Western grebe (Aechmophorus occidentalis), closeup of adult swimming with chicks riding on its back, Bear River Migratory Bird Refuge, Utah, USA, May.