Great Blue Heron
Ardea herodias
Synopsis: Widespread nester in small colonies in tall trees near water throughout the state. Nest early and forage over a wide area, thus detected at many areas during the later breeding season where they may not actually breed. Most notable are the records from Baker, Grant, and central Malheur County (nesting).

Habitat Associations:
strongest
Lake/Pond Shoreline & Islands (607293 acres)
Western Oregon Riverine Woodland (27749 acres)
Edges of Freshwater Marsh (17254 acres)
strong
Coastal Dunes & Ponds with Widely Scattered Shrubs/Trees (43358 acres)
some
Red Alder (123949 acres)
Wet Montane Meadow (2098 acres)
Streamside/Wetland Shrubland (2171 acres)

Relative Detectability: Easily seen, but some colonies are in conifers at remote locations, making confirmation of nesting difficult.

Challenge: Locate rookeries perhaps associated with some of the Possible records.