It’s happened to almost all of us who use the Greenbelt. There you are, either strolling along or cruising on your bike, when something rustles in the bushes and scares the bejezus out of you. Once you get past the initial fright, and realize that it’s not some creature out of the chronicles of cryptozoology out to get you, but rather a little bird, curiosity often takes the place of fear. For those who want to know what that tiny winged monster actually is, Idaho Rivers United is presenting a evening tour of the Boise River with a biologist and a raptor specialist. The tour shows the untamed side of the river, beginning at 6 p.m. on Tuesday, June 30 at the Garden City Library, 6015 Glenwood St. Former Idaho Fish and Game biologist John “Mr. Boise River,” Heimer and Trish Nixon, a raptor specialist for the Peregrine Fund, will lead the walk. Heimer will be responsible for talking about just what sort of critters can be found along the river, as well as how to identify native trees and bushes. Nixon’s part of the presentation will begin inside the library’s community room, where participants can get up close with a live raptor. She’ll also share tips on how to create a bird-friendly habtat. For more information on the program, call 208-343-7481 or visit the Idaho Rivers United Web site.