This is an endearing image of the wild burro known as Rags. It was apparently a popular tourist attraction for the era.
The description states:
N-4 I WANT MY MAMA
When the photographer found this baby bro and its mother out on the hot desert — it was an effort to separate them. The baby would call pitifully for its MAMA.
–This burro would also be portrayed on other souvenir items such as this plate. This image likely dates from the 1940s.