With the discussions on the various collections on which images with which releases go in which collections, I was looking at the individual page of some of my images. When looking at the Harris Hawk image, which I had marked as Property - Yes, Release - No, I noticed that on the page Alamy just says Property Release - No. It does not say that it requires one.
An image such as that would appear not to need one as it is of a wild bird so a buyer wouldn't look any further. Who would