Hi, Am I correct in recalling that blue birds will use nest boxes that have incomplete lid covers, IE partially open with a hole? If so som simple e modifications may entice them back and curtail tree swallow use? Just a thought
Rich, Nampa

Sent from my iPhone

> On Jun 19, 2019, at 9:21 AM, Elizabeth Medes liz.medes@gmail.com [ible] wrote:
>
> Bill,
> A friend on Cascade reservoir reports the same disappointing lack of nesting mountain bluebirds. Tree swallows moved into nesting boxes there the last two years.
>
> Liz Medes
> Emmett
>