“Try finding a Black Lab outside on a moonless night.
They are already tough enough to “photograph” in the sunshine on a sunny day.
Total photon traps.”
The first time I heard of that was when I adopted a beautiful, black flat-coat retriever from a rescue service (where he’d been for about 6 months) at their outdoor “fair”. I asked why they’d had him so long, and they said he was so dark they couldn’t get a decent photo of him for their web site (said it always came out a black blob) so nobody asked about him. That was my good luck - the best dog I ever had (got him at 2, had him for 10 years).
They can be photographed in good light, but you need a, now expensive, professional DSLR where one can manually adjust all of the exposure settings. I don’t have one of those, just the run of the mill iphone kinda stuff.
I used to take lots of pictures of my BIG JACK ( he died 2 years ago), I probably have 250 to 300 pictures of him.
The only thing (occasionally) you can see is his two dark brown eyes or his teeth and tongue.
Still love that old boy.