Kiwanis Ravine

Philip Maser / Heron Habitat Helpers

The great blue heron is one of Washington’s most iconic birds, as is the bald eagle. Now, it seems eagle attacks on heron nests are driving herons to abandon the largest colony in Seattle. And volunteers are asking local residents to help them figure out where the herons have gone.

For more than a decade, Pam Cahn has monitored the dozens of heron nests at Kiwanis Ravine near Discovery Park in northwest Seattle. The volunteer citizen-scientist has kept track of eggs laid, chicks hatched and fledglings flown, then sent the data to the state Department of Fish and Wildlife for record-keeping.

But Cahn says this season, eagles have wreaked havoc on the approximately 90 heron nests in Kiwanis Ravine.