Esschert Design Swallow's Nest, Plywood and Concrete nut and berry suet The cast iron construction forms

The cast iron construction forms a durable unit

Help purple martins nest in your yard with the Purple Martin Pioneer House

A soft gray

The black finish throughout the steel unit ensures a timeless look

Esschert Design Swallow's Nest, Plywood and Concrete nut and berry suet The cast iron construction formsEasily increase the size of your bird colony using this Esschert Design Plywood and Concrete Swallow's Nest. A rectangular, plywood backing handily supports a concrete hemisphere, forming a truly unique nesting spot for your feathered friends. The plywood base affixes easily to a wall directly beneath a roof overhang, keeping it protected from the elements, and the concrete section forms a welcome roosting spot for select birds. A 1. 5" long and 2.