Retailers who like offering their customers new feeders might take note of several introductions of the window-mounted variety. From Duncraft, these feeders feature a one-way mirror to bring birds closer than ever. The bird sees only a reflection of itself and doesn’t see inside the house. Get as close to the window as you’d like and observe every tiny movement and detail. The bird dines totally unaware and undisturbed. The three models are a covered platform tray for a variety of seed and two different sizes of hopper feeders for songbirds. These one-way Mirror Window Feeders are handmade of durable, 1/8-inch clear polypropylene at the Duncraft factory in Concord, N.H.