This video from the USA says about itself:
Glossy Ibis foraging in wet field
22 July 2015
Ibis are long-legged birds with long, down-curved bills that they use for probing into the mud and soil of wetlands and flooded fields. Glossy Ibis tend to look dark brown or black at a distance, like this one, although in the breeding season they can also be a rich iridescent purple in certain light.
Glossy ibis nesting in Algeria: here.