Really well done museum! Lots of different kinds of birds and tons of different information about the evolution of birds. Exhibits are both in Spanish and English so it's a great place if you don't speak much Spanish.
We planned to attend Museo del Desierto. However, since it was holiday, it was crowded. So, we decided to go to Museo de la Aves. It was beyond my expectations, it is not expensive. The collections and displays are awesome. It is a must-see in Saltillo.