Hi Jens
If you look at the hedgehogs facial features carefully, you will find that you can identify the different hedgehogs by sight. Some of them also have other features which are different, such as spine colour and the skirt (the furry bit underneath the spines). There is sometimes a ‘band’ between the spines and the skirt. It can be very rewarding recognising individual hedgehogs this way. When you get used to looking carefully, it becomes easier. I immediately noticed the hedgehog in your first video clip had dark facial markings which were very striking against the pale fur.
I usually draw a sketch when there is a new hedgehog and my profile picture is a sort of template for this. I find drawing makes me look more carefully at the tiny differences in the shapes of the facial markings, etc. I’m not much of an artist, but still find it helps.
Are the hedgehogs there hibernating now? Most of the ones here are. Just a few left.
