Exactly like ravens!
I have clip-on flashing LEDs for my dogs, if we’re outside for very long at night so I know where they are.
Since they guard silently at night, *not* seeing them is an advantage.
Imagine a burglar’s’ surprise.
:D
When I was young and lived at home, my dad was always yelling about my Dobes “suddenly appearing from nowhere” and goosing him when he came home from 2nd shift at midnight.
Freaked him out every time.
LOL.
I do have a clip-on LED capable of flashing for when we get to host the Big Black Dog (BBD).