They have erected many bluebird boxes and bat houses to house some of the natural wildlife of the park.

The nesting season for bluebirds runs from April through August, and the four nestlings are the last brood of the year in this bluebird box.

That organization built and distributed over 60,000 bluebird boxes by the mid-1990s and continues to sell them at cost.

But well-built bluebird boxes are not the only factor in the bird's return to the East End.

In fact, they thrive all over northern Westchester, largely through the efforts of a two-man team that built and monitored bluebird nesting boxes.

Mr. Proctor built the bluebird nesting boxes in the basement workshop of the Victorian house where his family has lived since 1914.

He has placed more than 500 bluebird boxes.

Generally, homeowners will not be successful hanging a bluebird box on their deck or close to their house.

A bluebird box near the sign contains envelopes for making donations to join the foundation.

Others might record bird and animal life, build bluebird boxes or bat houses.