Hi Irene, it is odd that the Trumpter would be keeping such company with the Mutes as, normally, those Mutes are rather possessive of their turf; however, it's not nesting season so perhaps they are feeling a little less so.
Were you able to see the number on the Trumpter's yellow tag? If so, you should report it to the Wye Marsh people who always appreciate people doing that.
Your Flickr photos are great, by the way.