Warner Bros. invades Disney's well-marked territory of family-friendly real-life adventure with this bio of famed nature documentarians Mark, Marty, and Marshall Stouffer. Pic focuses on the origins of the boys' fascination with animals, which started when their parents gave them a used 16mm camera to mess around with. After getting some footage of backyard wildlife, they're hooked, and hit the road to find more dangerous (and endangered) beasts to shoot (in the good way). As you would expect, the scenery and camera work are splendid, and any expected wild animal gore and violence has been toned way down. There's plenty to hold the interest of adults as well as children, with a big assist going to the clever script. Title is taken from Marty Stouffer's long-running PBS nature series.