My neighbor, down the road about one-quarter mile, has some pear trees. My bees loved them earlier in the year. Also, my bees worked some Bradford pear trees in town. These are the ornamental pear trees that have a beautiful spring bloom but produce tiny, unusable pears. I would believe your bees will work that tree.
I took my sister-in-law some canning pears, and she cooked up a great pear pie. It's been a while since I had eaten a pear pie. Dang, it was good.
No doubt about it, something in its environment tricked your pear tree into blooming this late in the year.