Whistling Heron (Syrigma sibilatrix) [XC699612]
by JAYRSON ARAUJO DE OLIVEIRA from Taquaral de Goi\u00e1s, Taquaral de Goi\u00e1s, Goi\u00e1s, Brazil (alarm call)
Whistling Heron (Syrigma sibilatrix) [XC245470]
by Jerome Fischer from Finca La Envidia, Vereda Puna Puna, Tame, Arauca, Colombia (song)
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.