I've been taking photos of the mountain goats on the slopes I see from my living room. At this distance, they are white spots with legs.
Even with a 500mm lens, you can barely make out that they are goats and not sheep.
Ah, but help is here. My cousin Bud sent me his 1000mm lens. Now, I have to get an adapter to attach it to my Nikon.
Soon, I'll be able to count the hairs on their chinny-chin-chins.