Awesome picture!
Check this website out.
Flight Radar 24 It's live and you can get all the info on the plane you're shooting, which could be cool...some dude heading to Lubbock, plane headed to Hawaii, etc...
Looks like that picture you got is of the big boy of the region, the Quantas A380.
It's a morning and night flight from DFW to Melbourne. It's in the Pacific now, headed for DFW (QF7).....It's incredible to see around DFW, you know immediately which plane it is. You hear it and say that sounds big...see the red tail, and go ohh my....the daily Quantas flight and watch it for a while.