Ruru seen at Kendalls Bay

I have been reading up on ruru, after a friend shared this photo of the ruru they saw recently at Kendalls Bay. 

I wondered why it was visible in the daytime, and also whether they need large old trees with holes for their nests. 

Apparently they hunt mainly in the early night and early morning, and sometimes at dusk and dawn, particularly in bad weather. And they nest in any tree large enough to have hollows).

There are some excellent recordings and photos….including one in Hillcrest, and one in Mairangi Bay…at ebird.org…