That’s what I thought for a while, but there was no female around, and no nest “renovations” going on…likely just a resting hole. Still had my heart beating fast and hard for a while as this species is out of its normal range here and does not breed here. A trip back to really make sure is likely in order :-)
Ottawa, Ontario, Canada.
Canon 7D + 100-400L @400mm, 1/400s., f/6.3, ISO 800.