There are five instruments in the oboe family, the oboe, the english horn, the oboe d'amore, the base oboe, the hecklphone, and the musette.
Oboe:
English horn:
Oboe d'amore:
Bass Oboe:
Hecklephone:
The hecklephone is one of the least used instruments in the oboe family(double reed). It is a lot like the bass oboe but has more sound.