To the casual observer, a flugelhorn looks very much like a trumpet or cornet but the tubing is wider and more conical.
Interesting flugelhorn facts
The German word flügel translates into English as wing or flank. In early 18th century Germany, a ducal hunt leader known as a Flügelmeister blew the flügelhorn to direct the wings of the hunt.
The modern day flugelhorn with valves is modelled on the Adolphe Sax (the creator of the saxophone and saxhorn family of instruments) instrument the B flat soprano (contralto) saxhorn.
The tone is more mellow and darker than the trumpet or cornet. The sound of the flugelhorn has been described as halfway between a trumpet and a French horn, whereas the cornet's sound is halfway between a trumpet and a flugelhorn.
The flugelhorn is a standard member of the British-style brass band, and it is also used frequently in jazz. It also appears occasionally in orchestral and concert band music.