For members of Vancouver Audubon Society, most days are for the birds — more precisely, finding and identifying birds, educating others about birds, and protecting birds.

On Tuesday, the nonprofit group will celebrate the 50th anniversary of its founding in December 1975 with a celebration following its regular monthly meeting.

The Vancouver chapter is one of over 400 chapters nationwide and 24 chapters in the state. Much has changed in those intervening years. Bird habitat has decreased significantly as Clark County’s population increased nearly fivefold, and smaller cities like Ridgefield and Battle Ground have added thousands of new homes. One thing hasn’t changed: Vancouver Audubon’s mission to protect and conserve bird species through education, advocacy, recreation and stewardship.

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