New interpretive plant signs in the upland area, Jackson Bottom Wetlands Preserve, Hillsboro, Oregon on April 21, 2010 by Greg Gillson.
April showers bring... migrants!
Lots of new birds arrived each day this week at Jackson Bottom Wetlands Preserve in Hillsboro, Oregon.
A locally rare migrant MACGILLIVRAY'S WARBLER was present on April 26. That day a YELLOW WARBLER was reported. ORANGE-CROWNED WARBLERS, WARBLING VIREOS, VAUX'S SWIFTS, and CLIFF SWALLOWS increased in numbers this week.
Both VIRGINIA RAILS and SORAS were heard calling in the marsh this week. An AMERICAN BITTERN was obvious at Kingfisher Marsh on APRIL 23.
GREATER WHITE-FRONTED GEESE migrated overhead starting on April 27. The first BLUE-WINGED TEAL of spring was spotted on April 23.
The pale gray PEREGRINE FALCON that has been seen every few days for the past month or so showed up several times during the week. A dark immature stooped on shorebirds over the mudflats of the Gene Pool on April 29. Eight immature BALD EAGLES were seen chasing an OSPREY that carried a fish on April 25. The nesting BALD EAGLES began bringing small prey items to the nest, so the egg(s) must have hatched about April 25.
Shorebird migrants included the first SPOTTED SANDPIPERS of spring on April 26. Two SOLITARY SANDPIPERS were present on April 28. Several other shorebird species arrived this week, the peak of their spring migration.
Jackson Bottom Wetlands Preserve is located at 2600 SW Hillsboro Hwy, Hillsboro, Oregon.
Greater White-fronted Goose
Great Blue Heron
Northern Rough-winged Swallow
Black-throated Gray Warbler