I visited Steigerwald National Wildlife Refuge on February 11th, where there is a large Heron rookery, and saw some herons on nests at that time, so they start early.
Bonnie Comegys blcomegys ATgmail. com Portland Oregon, Parkrose
On Mar 2, 2017 4:23 PM, "Pamela Johnston" <pamelaj...> wrote:
> When do they usually become active? > > Pamela Johnston > On Mar 2, 2017 1:37 PM, Lona Pierce <lona.pierce...> wrote: > > I've been monitoring a heron rookery not far from my home the past few > years: 80-plus nests located in a cluster of white oak trees on the edge of > Scappoose Bay in Warren. The nests are visible from Highway 30 before the > leaves cover the canopy. Sorry to see no activity at all this year. All > those nests and no herons. I wonder where they went instead. > > Lona Pierce, > Columbia County > >