J ulian Pratt, frontman for punk-rap bruisers Show Me the Body , has a simple request: Show us the pigeons. The shaven-headed 32-year-old vocalist and banjoist is tromping through Astoria Park, a verdant stretch of Queens along New York’s East River, with his two-year-old daughter, Surey, on the hunt for the city’s most famous wildlife. But since it’s an unusually chilly Friday, at least for May, the city’s famously ample winged rats seem scarce. Luckily, Pratt came prepared. Pratt runs deep