Oak Titmouse (Baeolophus inornatus) [XC149462]
by Paul Marvin from Hollenbeck Canyon Trail, Jamul, San Diego County, California, United States (song)
Oak Titmouse (Baeolophus inornatus) [XC481142]
by Meena Haribal from Pinnacles National Park, San Benito County, California, United States (call, song)
Subspecies
Parus inornatus (Sibley and Monroe 1990, 1993) has been split into inornatus and ridgwayi and both placed in the genus Baeolophus following AOU (1998). The name ridgwayi replaces griseus following AOU (2000).
Nominate subspecies and affabilis intergrade in south-western California (USA). Subspecies mohavensis sometimes merged with affabilis. Other proposed subspecies, all in USA, include sequestratus (south-western Oregon and north-western California) and kernensis (drainage basin of R Kern and adjacent eastern slopes of Sierra Nevada, in California), both synonymized with nominate, and transpositus (south-western California west of the deserts), merged with affabilis.
The following 4 subspecies are recognised:
inornatus (Gambel, 1845) - South-western USA (south-western Oregon south to south-western and south-central California).
affabilis Grinnell & Swarth, 1926 - South-western California and extreme north-western Mexico (northern Baja California).
mohavensis (Miller, AH, 1946) - South-eastern California (Little San Bernardino Mts).
cineraceus (Ridgway, 1883) - Western Mexico (southern Baja California).