During the funeral, flocks of crows flew in the yard.

Because crows have a keen sense of smell and can feel the smell of corruption and death, crows themselves are scavengers and like to eat carrion. Therefore, when crows smell the rotting body of the deceased at a funeral (sometimes humans can't smell it), they will think that there is food nearby, so they will hover in the sky to look for it. This is a normal natural phenomenon.