The answer to the crossword question “Some pigeon perches is LEDGES” is Ledges. The statement suggests that some pigeons prefer to perch on ledges, which are narrow, flat surfaces on buildings or other structures. Pigeons are known to be adaptable and urban birds, often seen roosting and nesting on buildings and bridges in cities. Ledges offer a convenient spot for them to rest or nest, especially if the building has a large population of pigeons. Therefore, the word “ledges” is a solution that fits the given clue in the crossword puzzle.