After birds cross Lake Erie on their southern migration from Canada, they stop to rest at Headlands Dunes State Nature Preserve, and Blackbrook Audubon Society will sponsor a Big Sit in the picnic area at the entrance to the preserve at 8 a.m. Sept. 21. With coffee and doughnuts, participants will gather to scan the nearby shrubs and trees for warblers and other fall migrants as they recharge before continuing their journeys, according to a news release. Organizers say this outing is ideal for less-mobile people who enjoy group birding. Blackbrook “perches” at this same location each May for spring migration and is offering this Big Sit during the Headlands Birding Festival, a celebration of fall bird migration. Participants should bring binoculars and a chair or blanket any time between 8 a.m. and noon. Headlands Dunes in Mentor shares a common entrance with Headlands Beach State Park at the northern terminus of State Rt. 44, or Heisley Road. After entering the park, stay to the right until reaching parking lot P-1. Public restrooms are nearby as is the entrance to the handicapped-accessible boardwalk leading to the beach. Email [email protected] for more information. Blackbrook Audubon is a co-host for the inaugural Headlands Birding Festival, set for Sept. 20 through 22, and has invited both keynote speakers to stop by the Big Sit. Jim McCormac is retired from Ohio Department of Natural Resources and has written several books. He will speak the evening of Sept. 20. Greg Miller, the Sept. 21 speaker, has birded in all 50 states and many countries. He was a consultant on the movie “The Big Year,” which was about the endeavor to identify the greatest number of bird species in one year, and Jack Black’s character was based on Miller’s story. The event schedule for the festival is available at eventbrite.com.