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Glossy Ibis

Plegadis falcinellus

Glossy ibises wade through marshes and other wetlands in search of prey. (0ystercatcher/Flickr)
Glossy ibises wade through marshes and other wetlands in search of prey. (0ystercatcher/Flickr)

The glossy ibis is a heron-like wading bird with dark green and purple plumage. It visits Chesapeake Bay marshes and wetlands from spring through autumn.


  • From early spring to mid-summer, adults are in breeding plumage: a chestnut head, neck, upper back and underparts, and metallic green and purple wings and tail. Breeding adults also have pale blue skin along the edges of the base of the bill.
  • Adults in nonbreeding plumage are duller in color, with white streaks on the head and neck
  • Long, slender, dark gray bill curves downward at the tip
  • Long, dark grayish-green legs
  • Grows to 25 inches with a wingspan of 36 inches


  • Lives in wetlands, including marshes, swamps, wet meadows and flooded fields


  • Visits the Chesapeake Bay from spring through autumn


  • Feeds on insects, small fish and aquatic invertebrates, including mollusks and fiddler crabs
  • Uses long bill to probe through mud and shallow water to find prey

Field Guide: Glossy Ibis (Plegadis falcinellus) from Chesapeake Bay Program on Vimeo.


  • Flies with an outstretched neck. This differs from the flight behavior of herons and egrets, which have crooks in their necks when they fly
  • Often flies in groups that synchronize gliding and wingbeats


  • Makes a low kruk or ka-honk sound 
Glossy Ibis courtesy of Pamela C. Rasmussen, Avian Vocalizations Center

Reproduction and Life Cycle:

  • Nests in breeding colonies on islands, including Smith Island in Tangier Sound
  • Builds nests of sticks and twigs in bushes and low trees, usually over the water
  • Sometimes nests in mixed colonies with herons
  • Females lay three to four eggs, which both the male and female incubate until they hatch approximately three weeks later
  • Chicks fledge about 25-28 days later, although they aren’t independent from their parents for another three to four weeks

Other Facts:

  • Scientific name means “scythe” or “sickle,” referring to the bird’s distinctive downcurved bill
  • The glossy ibis is the most widespread ibis species in the world

Sources and Additional Information:

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