As a follow up to this post, and it's happened before, but I didn't equate the events.
I take a lot of Egret images waiting for them to fly...I want the BIF series to photo-merge. Anyway, I'm sitting there waiting and clicking...getting this
He then has a moment of indiscretion, he takes a dump and I start to laugh, losing him in the viewfinder and my series shot is gone.
Moral of story...if they take a dump, they are gonna take off.
First time it happened, I didn't see it until I downloaded the image...kind of embarrassing.