Greater Yellowlegs, Jackson Bottom Wetlands Preserve, Hillsboro, Oregon on April 21, 2010 by Greg Gillson.
There were heavy migrations this week of YELLOW-RUMPED WARBLERS and CLIFF SWALLOWS, with about 1000 each on April 20.
A PEREGRINE FALCON has been hanging around. A very rare GOLDEN EAGLE flew through on April 17. A MERLIN was reported April 22.
New migrants for the wetlands this week include AMERICAN BITTERN (4/18), BROWN-HEADED COWBIRD (4/19), VAUX'S SWIFT (4/20), WILSON'S WARBLER (4/20), WARBLING VIREO (4/21), an early BULLOCK'S ORIOLE (4/21), and LESSER YELLOWLEGS (4/22).
Dozens of WHITE-CROWNED SPARROWS and GOLDEN-CROWNED SPARROWS migrated through this week. Several LINCOLN'S SPARROWS were also noted. A WHITE-THROATED SPARROW, perhaps the same one noted for a couple of weeks in the front of the building, also put in an appearance at the back feeders this week.
Shorebird numbers increased this week. A flock of about 25 GREATER YELLOWLEGS was noisily flying about the wetlands on April 22. DUNLIN were molting into their breeding plumage with black belly patches and a few rusty feathers on the back. Within a few weeks they will live up to their former name, Red-backed Sandpiper.
Jackson Bottom Wetlands Preserve is located at 2600 SW Hillsboro Hwy, Hillsboro, Oregon.
Here is the list of 82 species reported for the week of April 17-22, 2010.
Great Blue Heron
Northern Rough-winged Swallow