MEXICO:
Benstead. Northern Mexico 20 April - 7 May 2004. Hansson. Birding in Central Mexico, 28 June - 26 July 2002. (See days 5 - 12 July only, same places as us)
Forslund & Rydell. Skådarresa till Texas 7-16 april 2001. (In Swedish) Download pdf
Jensen. Texas 12-27 April 2003. Download pdf