I have to agree with Scott: 

"I assume its regional choices of lumber

 Sugar pine is what I have made many screen doors from here. Light,
strong, holds up to weather.
 People were known to split out shake roofs from sugar pine once, and it
lasts for generations."

One house I lived in was built in 1906 or so.  The screen door was
original to the house.  Sugar pine.  And that's what I used to build
screen doors and window screens for years.  No need to get exotic. 

Mike in Woodland