See who comes back this spring when OSU’s Secrest Arboretum in Wooster, part of OARDC, holds a free public bird walk April 9. Northward migrating birds, such as tree swallows and eastern phoebes, should be among the arrivals, who may find the place looks different than when they left. A tornado hit the arboretum last September — after many summer birds had gone south — and turned more than 1,000 trees (on about 30 of the arboretum’s 120 acres) into virtual toothpicks.