Probably the bird thought his tail is a giant worm coming out from his butt...

for this bird the dog's tail must be looks like sausage

Crows do this generally to steal food. The will go behind a bird of prey while its eating, peck its tail feathers, and swoop around to steal the food while the bigger bird is distracted. This criw is doing the same thing, but just for shits and giggles

that magpie knew the dog was tied up! it was just having a bit of fun, super smart birds

The bird was curious, the dog seemed to be in a playful mood too so that’s good

You can see so much intelligence in this bird.. it’s amazing

It's all fun and games until the dog is not tied up

Paul, it seems the pigeon thinks the dachshund's tail is a big worm. From an old song we once used to play: "And those birds just walk around eatin' them worms..." Peace Out, Tony Juliano

Dog: hi!! bird: 😳 Dog: WANNA BE FRIENDS!? 😁🤗🤭 Bird: 🦅

Crows are the ultimate trolls of nature!😂

My cat would do something similar. It would lay down just out of reach and lay on its back. My dog would stand whining because he couldn't reach the cat to play. So the would pop the dogs nose. Not with claws. Just to tease the dog. It was so cute

Dog to bird; "STOP BEING RUDE!" 😠😡

To answer you question. He does it because he can and think it's funny.

Reminds me of a tom and jerry skit where the dog is chained and tom hits him with a newspaper and baseballbat

Magpie uses fury attack “super effective”

The bird thinks it's a huge worm 😂

That bird acted like a bum brusher in a bar. 😂

Even a bird is sensing a sensitive/pushover of a dog

Dogs: Now You Know Why We HATE BIRDS!!!!!!

I liked when the other dog joined

rowdy bird!

You ask why...well say why not?!?! 😂

Why? The real question should be why not? How else would birb get the chocolate surprise?

crows do stuff for shits and giggles, it doesn't think the tail is a worm.

its a crow and a young one and it is doing it for sport.

BECAUSE THE PUPPY DOG HAD 8 FLEAS!!!!!!!

That should've been a cat to teach that smarty pants a lesson The dog keeps turning his back without being careful it's like he's enjoying this game😝 The best part is when the crow says enough is enough & follows the dog to down stairs & starts biting nonstop😋

Its obvious why - for fun.

That bird is picking fleas off that dog

I think the crow is gay

THE BIRDIE SO CUTE LOL I WANT THAT BIRDIE

🙄 the heck?

No one should tie there dog up and leave