Sean Sime writes:

"A brief lunchtime walk around the mostly frozen Celery Farm yielded a pair of Common Ravens.

"Ravens were acting very territorially. I watched one pursue a Red-tailed Hawk and roughly 15 minutes later watched both birds harass 3 Black Vultures. A Raven chased one of the vultures in two large circles over the eastern side of the CF. It appeared it may have made contact with the vulture on more than one pass.

"It's interesting to note that just a few years ago Raven and Black Vulture would have caused quite a stir and here I am today, wondering if this even warrants a post."

(Thanks, Sean!) His full eBird list follows.