See hummingbirds up close with this Window Hummingbird Feeder from Perky Pet.  The feeder can be mounted on a window, wall, or post.  It holds 8 oz of nectar, and has 2 feeding stations.

• Plastic Window Hummingbird Feeder
• Measures about 8 ^1/2 x 5 ^1/2 x 3 ^1/2 inches
• Capacity: 8 oz of hummingbird nectar
• 2 feeding stations
• Perches are removable