Ravens or Crows???

There has been a large group of black birds all over the street and in the yard and across the street and I wonder what kind they are and why there is such a gang of them hanging out together and what they are doing!!

Then I see a lone black bird, larger, swooping around.

Since I can never remember the differences I looked it up.  The large group are Crows and they often travel and live in large groups.  Their tails are straight across.

The lone guy may or may not have another with him but they seldom gather in groups.  He has the tail that is longer in the middle and he is a Raven.

Now I know, I should take their pix.