wading birds of warm regions having long slender down-curved bills
"After spotting a flock of ibis foraging near the marsh, we marveled at their elegant appearance and distinctive long, down-curved bills."
Any of various long-legged wading birds in the family Threskiornithidae, having long downcurved bills used to probe the mud for prey such as crustaceans.
"The heron and the ibis both stalked the muddy shallows, though only the ibis dipped its distinctive curved bill into the silt to snatch a hidden shrimp."