Bigfoot Screams

If you have ever heard a Bigfoot scream, then you will want to compare it with the screams that I found at this site:
http://www.oregonbigfoot.com/sounds.php
The 3rd-7th screams best describe what My daughter and I have heard, The sno screams are almost exact. We heard the screams in Washington state over a two year period (2006-2007), Notice that the screams I refer to also come from Washington state.

I am conviced that this is not an animal like a bear.I do believe the last recordings at the site mentioned to be a bear though.(excluding the loudest recording)
What do you think of 3-7? I know that #3 sounds like the train possibly made the hoot, but I am not sure. It is awfull similar to the rest.
Note: There are no trains near our location in Dixie, Washington.