Birdwatchers can spend next Saturday, February 12, looking for winter warblers and other creatures in West Caldwell’s Hatfield Swamp. The trek is organized by the New Jersey Audubon Society and costs $6 for NJAS members and $8 for non-members. Space is limited so call Kelly Wenzel at 973-226-6082 for more information and to register. The hike meets at 8 a.m. in the Marshalls parking lot in West Caldwell.