Ornithological society Birdlife Finland says some migratory birds have arrived in Finland exceptionally early.

Tiny songbirds such as grosbeaks and warblers migrate thousands of miles, flying at night and resting during the day, to and from their wintering grounds—and unlike many larger birds ...

Yet billions of birds, especially migratory songbirds like warblers ... or an early, mild spring in New England or Missouri. Consequently, their arrival times have shifted only marginally.

The study, "Social associations across species during nocturnal bird migration," appeared in Current Biology on Jan. 15. "We can't be sure what they're saying, but birds might broadcast calls ...

The Lake County Audubon Society will sponsor a free talk featuring noted birder Adam Sell at 7 p.m. Feb. 3 at Aspen Drive Library, 701 N. Aspen Dr., Vernon Hills. The talk focuses on helping novice ...