The Augusta Bird Club, Maine Master Naturalists and Upstream groups plan to offer guided bird walks at 7 a.m. and nature walks at 10 a.m. Saturday, May 21.

The walks, to be held at the Harrison Avenue Nature Trail in Gardiner, celebrate World Fish Migration Days.

According to a news release from Gardiner Main Street, 56 species of birds and thousands of alewives were seen in previous years, and the trail is a Kennebec birding hotspot and the go-to place to observe river herring on Cobbossee Stream.

People can park at the New Mills Dam parking lot on Cobbossee Avenue for the one-mile hike.

They can bring binoculars and phone to connect to the QR code signposts along the trail to learn about the history and wildlife on the stream.

For more details, call 207-582-0213, email upstreamcobbossee@gmail.com or visit the event on Facebook.

Also, the alewife planters and chairs will decorate the downtown and Pumphouse Deck on World Fish Migration Day at Gardiner’s Waterfront Park. People can be on the lookout for ospreys, cormorants, eagles, kingfishers, gulls, minks, otters and sometimes the seals that chase the river herring home.

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