Flutes of all types

 

Piccolo

 

D4-C7C: 1 octave higher
Db: minor 9th higher

 

Flute (in C)

 or

Querfloete

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C4-D7Professional model flutes may employ a

  B-footjoint 

which allows them to play 1/2 step lower.
There are a few isolated instances of a low Bb in the flute literature but these are rare.

 

Alto Flute (in G)

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C4-C7a Perfect 4th lowerThe 

 Alto Flute is sometimes incorrectly referred to as a Bass Flute. There are also a number of other designs for low-pitched flutes which are not generally used in an orchestra except for special situations.

 

Bass Flute

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The instrument's sounding range is from C3, one octave below middle C, to C6, two octaves above middle C. Bass flute music sounds an octave lower than it is written, which is the typical concert flute range (C4 to C7)