Martins roost on purple martin houses recently at the Yeaton Farm in Belgrade.

Martins roost on a group of purple martin houses recently at the Yeaton Farm in Belgrade.

Don Mairs watches for purple martins recently at the Yeaton Farm in Belgrade.

Martins fly around a group of purple martin houses recently at the Yeaton Farm in Belgrade.

Martins fly around a group of purple martin houses recently at the Yeaton Farm in Belgrade.

A martin sits on a house recently at the Yeaton Farm in Belgrade.