It’s not like anyone was pulling out a ruler and measuring the distance between bird droppings, but if College Station recreation supervisor Laurie Brown were to guess, she’d say they were an inch apart—a speckled, white-and-brown blanket coating a walkway in College Station’s popular Northgate District. “In some cases,” she says, “there was bird poop on top of bird poop.”What was causing this tableau—grackles? Starlings? City workers called Sheldon Nicolle, owner of the local bird-abatement outfit Raptor Enforcement, as Nicolle was familiar with the walkway the birds were said to be occupying. It was an area known to just about any Aggie due to its proximity to the college hangout the Dixie Chicken—although, more specifically, the birds’ temporary address was out back from the restaurant,…