French: Pic de Williamson German: Kiefernsaftlecker Spanish: Chupasavia oscuro
Georgetown, Eldorado County, California, USA.
Has hybridized rarely with S. nuchalis. Two subspecies recognized.
Subspecies and Distribution
S. t. thyroideus
(Cassin, 1852) – SW Canada (S British Columbia) S through Cascade Range and Sierra Nevada to N Baja California (San Pedro Mártir Mts).
S. t. nataliae
(Malherbe, 1854) – SE British Columbia S through Rockies to Arizona and New Mexico; winters in S of range and S to WC Mexico.
c. 21–23 cm; 44–64 g. Male has white nasal tufts, lores and long moustachial stripe, white stripe from above eye curving down on nape side, red chin and... read more
Single explosive, pulsating calls distinctive; also low-pitched guttural “k-k’-r-r-r”; squealing... read more
Mixed montane forest dominated by spruce (Picea), firs (Abies) and pines (... read more
Food and feeding
Diet consists of insects, including ants, beetles, larvae, dipterans, Homoptera; also sap; nestlings fed mostly wood ants (Formica... read more
Mid-Apr to Jul; peak of laying in first week Jun. Monogamous; solitary. Nest-hole drilled at 0·8–26 m in snag, or in live tree... read more
Largely resident; but some migratory movements, and also post-breeding dispersal to lower... read more
Status and conservation
Not globally threatened. Fairly common in USA; fairly common breeder in N Baja California. No information on total numbers; density 1 pair/40 ha in California, 4·1... read more
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