In different tunings and wood typs
Bass flutes are particularly suitable for the accompaniment of higher melody instruments.
In order to play them, you need a little more breathing volume, and because their holes are larger and the hole distances are wider, you need a little more practice to play them - small hands are something of a disadvantage.
The two flutes "Condor Bass in E" and "Condor Bass in D" (regardless of the type of wood) represent the transition to the bass-flute range. Thus they are a popular compromise between bass and melody and can still be recommended to small hands.