1. Transparent Design Our window bird feeder is made of transparent plastic acrylic material, which is easy to observe and attract more birds to your garden. You can hang it under the tree or attach it to the window, and it stays firm in extreme weather and is not easily blown away by the wind. 2. Removable Tray: the bottom tray is removable, which is convenient for filling food and cleaning. The bottom of the tray has drainage holes so you don't have to worry about moisture and mold from bird food. 3. STRONG COMFORT The windows of our small transparent bird feeders are designed for the and comfort of birds. The transparent window bird feeders are designed for all types of birds and plenty of space. The rounded corners have no sharp edges or points. 4. POWERFUL SUCTION CUPS The window bird feeder is equipped with 4 extra large suction cups, which will not fall off even when many birds are eating at the same time. In addition, the suction cup design can prevent squirrels from stealing the food.