It's hard to tell, the fluff kind of all blends in. But at least a couple of times I thought I could make out three hatchlings while she was feeding the latest prey to them. Though she seemed to have a harder time with this one. She just left the nest again.
In my head, she was muttering, "This prey sucks. Too tough. Off to get more." Obviously I was wrong, because now she's back just sitting on them, so she was just taking out the trash.
I looked at some of the older pictures, and I think 1998 was when I was introduced to this nest, and I think it was
popeseasons who pointed me to it. I'm almost certain I recall watching it at my old job at UMass.