Range Description
Cuculus vagans is confined to the Sundaic lowlands, from south Tenasserim, Myanmar, peninsular Thailand, south Laos, Sabah, Sarawak and Peninsular Malaysia, Singapore, Brunei, Kalimantan, Sumatra and, occasionally, west Java, Indonesia, where it is generally uncommon. It is thought to be declining owing to the extensive loss of lowlands forest within its range.
