Clay-colored Thrush (Turdus grayi) [XC277327]
by Manuel Grosselet from Santa Ana National Wildlife Refuge, Texas, United States (song)
Clay-colored Thrush (Turdus grayi) [XC380933]
by Manuel Grosselet from Camino al Parque la Estanzuela, Mexico (call)
Subspecies
Has in the past been thought to form a superspecies, or even to be conspecific, with Spectacled Thrush (Turdus nudigenis), but differences between the two considered too great to warrant such treatment. Geographical variation for the most part very slight. Some subspecies perhaps better merged.
Proposed subspecies umbrinus (from Guatemala) apparently based on fresh nominate specimens.
The following 9 subspecies are recognised:
tamaulipensis (Nelson, 1897) - Extreme southern USA (southern Texas) and eastern Mexico (eastern Nuevo León, Tamaulipas, northern Veracruz).
microrhynchus Lowery & Newman, RJ, 1949 - East-central Mexico (south-central San Luis Potosí).
lanyoni Dickerman, 1981 - Caribbean drainage of southern Mexico, northern Guatemala and southern Belize.