Corvus sierramadrensis
The Sierra Madre Crow (*Corvus sierramadrensis*) is a strikingly elegant corvid, endemic to the high-elevation pine-oak and fir forests of its namesake mountain ranges. Measuring approximately 45-50 cm (17.5-19.5 inches) in length with a robust wingspan of 90-100 cm (35.5-39.5 inches), this medium-sized crow is characterized by its glossy, iridescent black plumage that shimmers with deep purple and blue hues in direct sunlight, especially on its head and mantle. A key distinguishing field mar...
Exclusively found in high-elevation pine-oak, fir, and cloud forests, typically between 1,800 to 3,500 meters (5,900-11,500 feet), favoring dense canopy cover and steep, rocky terrain.
Omnivorous and highly adaptable, consuming a wide range of invertebrates, small vertebrates (lizards, nestlings), eggs, carrion, seeds, nuts (especially pine nuts and acorns), and fruits. Primary foraging methods include ground gleaning, probing bark, and caching food.
Sierra Madre Crows are diurnal, often forming communal roosts of 20-50 individuals in dense fir stands or on inaccessible cliff faces, dispersing at dawn to forage. Their foraging strategy is highly opportunistic and adaptable, involving ground gleaning, arboreal searching for insects and eggs, a...
The Sierra Madre Crow is strictly endemic to the mountainous regions of Mexico and parts of northern Central America, primarily inhabiting the Sierra Madre Occidental, Sierra Madre Oriental, and the Trans-Mexican Volcanic Belt. Its core breeding range extends from southeastern Sonora and Chihuahu...
Near Threatened
- The Sierra Madre Crow has been observed using small twigs and thorns as tools to extract insects from crevices in tree bark, showcasing advanced problem-solving skills. - Indigenous communities in the Sierra Madre orient their planting calendars based on the crow's specific seasonal calls, beli...