I couldn't put these in another post, but they are both related, so I'll post them here.
This is the DeHavilland (now Bombardier) Dash 8. The Dash 8 was born out of the Dash 7 project in the 1970's. DeHavilland was developing a short field capable aircraft for use from smaller airports. It was powered by four engines. The only problem was that only a handful of airlines were interested in it as they were trying to reduce operating costs.
In 1980, the DeHavilland Company responded with the Dash 8. Instead of using four engines, it would use two more powerful PW120 engines. It would a t-tail to limit the effects of prop wash. I'm not sure why it would use a high aspect wing, but it gave it a very distinctive appearance. The first flight was in 1983. Since then, a little over 1200 planes have been delivered.