Crow outside of house for about 3 weeks?

the same blace crow has been outside for about 3 weeks now, he seemas to be sitting in the branches of my tree almost every time i come outside, no one else in the family has really noticed it and there are a total of 9 in my house, i recently moved in with my mom because of money issues, along with my husband and 3 year old son, this thing is really starting to scare me, is this a bad omen? if so what is it?