They are described as a conspicuous fairly large white bird with black head and neck, and large decurved bill. Gregarious.
Feeds during the day on moist ground, probing mud and soft earth. These birds are quiet most of the time, making grunting or croaking sounds as they feed.
The flock flies in a V formation to save energy the movement of their wings are synchronize to catch the updraft of the preceding bird.
When the lead bird tires, it drops back to let another take over.