The HummZinger Fancy Hummingbird Feeder has four feeding ports for simultaneous feeding. It's easy to clean, and features an "ant moat" that keeps crawling insects out of the sticky nectar. This hummingbird feeder is leak proof and drip proof, with a manufacturer lifetime guarantee. The feeder measures 27cm tall x 20cm wide. It's our most popular hummingbird feeder and the bestselling hummingbird feeder in North America. Hang this feeder in early spring to attract Rufous hummingbirds, and keep it full all winter to feed Anna's hummingbirds that do not migrate during cold weather.