Yes, they generally just sit around snoozing during the day. And that’s good sign; birds that are stressed and starving are more likely to hunt during the day. This one got until 11:30 am before someone inadvertently scarred it off, which is better than I expected, given the amount of activity in the park; the holiday probably helped.
Here’s another article on the topic.
The situation is not all that clear; I’ve heard they come down due to over population in good years, not due to tough times, but there could be truth in both. And they do like coastal areas as well as fields; most years see at least a couple on the Long Island barrier beaches, but this year is extraordinary. On the coast they fly out to sea and take ducks and other birds on the water, which seems like a better deal than rodents, if you ask me.