Acorn woodpeckers are highly social birds. The range defined by TBBAP data is essentially the equivalent of that defined by The Bird Life of Texas (Oberholser 1974). Range of the Acorn woodpecker. Behavior: A bark-gleaner. The acorn woodpecker’s habitat range will start to shift up north as temperatures rise due to climate change. Throughout its range, this species is closely associated with oaks (genus Quercus) and is most commonly found in pine-oak woodlands.” Here in the Bay Area, acorn woodpecker colonies are fairly common in the East Bay hills and the western slopes of Mount Diablo, particularly where there are concentrations of valley oaks. The acorn is noisy and conspicuous in communal groups, with raucous “Woody Woodpecker” calls. EXPANSION OF THE BREEDING RANGE OF THE ACORN WOODPECKER EAST OF THE SIERRA NEVADA, CALIFORNIA ANDREW KIRK and LEAH KIRK, P.O. In some parts of their range (e.g., California), the woodpeckers create granaries or "acorn trees" by drilling holes in dead trees, dead … U.S./Canada Population Estimate: 2,000,000 Population Trend: Increasing Habitat: Western forests with oaks Threats: Habitat loss, invasive bird species (European Starling), occasional hunting Note: In the fall, Acorn Woodpecker groups choose a “granary” tree into which they drill holes to store acorns.A single granary tree can sometimes hold up to 50,000 acorns. The Acorn woodpecker is found in the western half of Oregon and California, and in Arizona, New Mexico and down throughout Mexico. The Acorn woodpecker needs a large family to collect and store enough acorns for the winter. STATUS: The Acorn Woodpecker appears to be relatively stable in Texas. This dataset represents a species known range extent for Acorn Woodpecker (Melanerpes formicivorus) within the conterminous United States (CONUS) based on 2001 ground conditions. and where they nest. The breeding females often keep their eggs together in a shared nest, which is always inside a tree cavity. Development: Across the acorn woodpecker's range, the complete nesting cycle takes approximately 45 days to complete (4 days for egg-laying, 11 days for incubation, and 30 to 32 days for young to develop before fledging) [68,72,135]. Habitat/Range/ Migration: Acorn Woodpeckers occur in areas with mature Live Scrub Oak trees particularly in transition zones between oak plant communities and Ponderosa Pine forest. Their habitat contains the kinds of food they like to eat (acorns!) This range map was created by attributing sub-watershed polygons with information of a species' presence, origin, seasonal and reproductive use. Acorn hoarded by acorn woodpecker Food and homes Acorn woodpeckers, as their name implies, depend heavily on acorns for food. Multiple members help incubate the eggs. The one exception is the confirmation of breeding in south-central Texas. 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