(Gresham, OR) -- A popular bronze sculpture in Gresham's Nadaka Park has been stolen. Gresham Police say the two-foot-tall bronze otter, named Slider, was stolen sometime over the last two weeks. The sculpture was made by local artist Rip Caswell, and his son Chad. A raven, named Seeker, remains on top of a nearby wooden pole. Police are asking for tips if anyone sees it for sale. Local metal recyclers have been asked to watch for it.