Squirrel Proof Spring Device GLID_3237_ ) And while the text

) And while the text is aimed at adults--including fascinating new scientific research on the myriad ways birds have adapted to environmental changes--it is nontechnical

When customers have concerns about hard-to-clean nectar feeders

A Field Guide to Hummingbirds of North America

food and feeding

Useful flight identification criteria are provided and the accompanying text discusses all aspects of in-flight hawk identification

Squirrel Proof Spring Device GLID_3237_ ) And while the textHang on Shepherds Hooks or poles up to 1 inch in diameter Modeled for a single hook Shepherds Hook Pole. Keeps squirrels on the ground and your bird feeder Squirrel Proof. Length expands up to 48 inches.