The title is a play upon the 1945 Jack Benny film The Horn Blows at Midnight, a notable flop which Benny often poked rueful fun at on his radio show.
Foghorn Leghorn talks about his scrawny wings, but he actually has human like arms...and hands.
Although this short takes place outdoors, the background is rendered in the perfect detail of the era's animators: dog house, stone wall, even the candle and match Henry uses.
A chicken hawk is an unofficial name for one of three hawks native to the U.S.: Cooper's, Red Tailed, or Sharp Shinned. Despite the name, most hawks hunt for rodents rather than poultry.