The P61 black widow was a light fighter/bomber and reconnaisance plane that usually had a non reflective black paint job for night flying. it was literally the stealth plane of it's day. The P51 mustang, however, was a single seat fighter and was much smaller.
The P-61 was the largest and heaviest fighter aircraft to serve with the USAAF in WWII.
The P-61 was the first US aircraft specifically designed for night fighting.
