Below is a display at the museum featuring the tall grey aliens, reportedly from the Zeta Reticuli star system.  These were the same alien types that U.S. geologist Phil Schneider reportedly did battle with in Dulce, New Mexico (which is about 200 miles away from the museum).  These WERE NOT the same aliens at the Roswell crash site, at least per drawings done by witnesses at the crash site (in 1947).  Also note that the crash of the space ship took place in Corona, New Mexico, and Corona is between 50-100 miles away from the metropolitan area of Roswell, New Mexico.

Here's another shot:

And a close-up:

Below is a drawing of what the Roswell Crash aliens reportedly looked like in their space craft:

And below is a drawing of their control panel found in the craft, before the U.S. military industrial simplex scooped it up from civilians living near the crash site.

And below is a comparison of a tall grey (on the left) with the Roswell Crash alien.  I really think that the display used the tall greys in their display because of their intimidating appearance:

Below is a scaled-depiction of the famous autopsy of one of the Roswell Crash aliens:

And a close-up:

Below is Barney and Betty Hill, the famous Canadian couple who were reportedly abducted by the grey aliens.  Betty reportedly asked the aliens where they were from, and a star map was claimed to be shown to her.  She drew the map under hypnosis; the star positions of this map would be identified years later as the Zeta Reticuli start system.

And below is a small model depiction of what the Roswell Crash space craft looked like when it was found.  Note that today there is much desert shrubbery and small desert trees at the actual crash site; the Corona, New Mexico land of the actual crash site is privately owned and the owners will prosecute you to the full extent of the law if you trespass there. 

The Roswell International UFO Museum And Research Center is open daily from 9AM to 5PM (except Christmas, Thanksgiving, and New Years Day) and is located at 114 North Main in Roswell, New Mexico.  Admission for adults is $5, and children are $2.

May the force be with you!!