Those things can come out of nowhere ... Puzzle #3

About 3 weeks ago I was preparing to leave for evening obs when Ben calmly walked up and asked if I wanted to see something. I said sure without asking what it was because Ben is great at finding cool animals and birds to look at. We walked a few paces up the driveway and he pointed to the a tree. I stared for a few seconds and spotted a ....

See if you can find what it was.

The last post had a baby Thompson's gazelle hidden on the right side of the picture. About two months ago there were hundreds of these around the Mara. They lay completely still in the grass to avoid being noticed by predators, like hyenas. They remain so well-hidden and calm that we almost drove over a few, but always managed to avoid them at the last minute.