The Hindu religion is connected with a lot of superstitions and beliefs on good luck and bad luck. A crow is also one such belief of humans, where it is understood that this bird can predict our future.
A lot of things, which bring us good luck or bad luck are associated with a crow
If a lot of crows get together at one place and make noise, that particular place, which can be a home, village or office, can suffer from a bad news. Also, the owner of that particular place can land into trouble.