Whistling Heron (Syrigma sibilatrix) [XC413527]
by Fernando Igor de Godoy from Santa Rita do Novo Destino, Goi\u00e1s, Ch\u00e1cara Jayrson, Brazil (flight call)
Whistling Heron (Syrigma sibilatrix) [XC278065]
by Luiz C. Silva from Reserva Ecol\u00f3gica de Guapi A\u00e7u (REGUA), RJ, Brazil (call)
Subspecies
Validity of subspecies fostersmithi sometimes questioned.
The following 2 subspecies are recognised:
sibilatrix (Temminck, 1824) - Bolivia to south-eastern Brazil and north-eastern Argentina.