Wildlife Spotting

I'm not sure what Anurag is talking about. There may be aggressive bees in India where Anurag is from. Here in the USA most honey bees will not bother you unless you bother them and they don't attack in mass. Now with that being said there are African Killer Bees that have been an issue in the southern US and they do attack in mass.

Really? I thought they weren't aggressive. I've observed and photographed tons of them, and they've just ignored me.

Glad you could spot it alone! It's a honey bee, it moves in large groups. And it bites. My advice : Look for it's honey comb nearby. If you find one don't get close, they work together. If one gets aggressive, it makes others violent too and there is no stopping them. Search for any honey makers in your area and get the honey comb moved.