Kenya's most hated birds pose big threat to Coast ecosystem

Indian house crows at Kibarani Dumpsite in Mombasa. [File, Standard]

They are everywhere-perched on power lines, rummaging through piles of garbage, loitering at the entrances of roadside eateries, and hovering near fishmongers' stalls.

Their presence is ubiquitous, and their toneless, dry calls of "Hraaa! Hraaa! Wreee! Wreee!" echo from dawn to dusk.