The South Fork Natural History Museum in Bridgehampton is heading out into the wild to do some species spotting. Tomorrow night at 7, Joe Giunta, a birding instructor for the Brooklyn Botanic Garden, will lead participants on an owl prowl. The evening starts off indoors with a slide show and an audio presentation of various owl calls and then ventures into the woods as Mr. Giunta attempts to call the nocturnal birds into viewing range. The museum says odds are good for spotting an eastern screech owl and possibly a great horned owl. Binoculars have been recommended.