 When a plover is defending a territory, a harsh ‘chiza-chiza’ can be heard, followed by a ‘purrr’ or ‘squeak’.When the incomplete egg set is visited, a ‘croo’ sound is called, and during incubation a short ‘clirrup’ sound or ‘clup’ is made when alarmed.Other alarm calls consist of ‘kittup’ and ‘chirrrt’.