Crows: An Omen?

A couple of days ago, I was walking one morning when I saw this house. It was big, painted white, and on the roof, a murder of crows was perched. They were flying around the house making noises. I didn't understand why they were at that specific house only. The houses around it didn't have any crows perched on the roof.

It was creepy. I tried looking hard at the roof, maybe there's some sort of food in there and the crows were having a feast, but no. They were just perched, and some more are flocking on the roof. It appears they were having a meeting of some sort. Then I thought, could it be an omen? Could've someone died there that morning? I didn't dare find out. I was too scared.