I just reread some posts about eastern gray squirrels sent to the Mid-valley Nature list from April and August of 2017. Since we moved to Corvallis in early fall 2016, I had only noticed the native western grays and Douglas squirrels around town. That has changed dramatically in the last several weeks.
About a month ago, I started seeing at least one eastern gray on my walks to Winco through the neighborhood to the west of Kings Blvd (not to the east of Winco, where Jamie Simmons had previously reported them). Then, a few weeks ago on a bike ride through Willamette Park, I noticed one at the edge of the riparian area east of the ball fields. And now, this morning, there was one in our backyard on NW McKinley (a couple blocks west of 29th).
Either I suddenly developed an eye for them, or they may be expanding around town (perhaps last year's bumper crop of acorns gave them a boost?).
Nancy Stotz