A small, knob-like organ (sometimes shaped like a baseball bat or bowling pin) located on the thorax of insects of the order Diptera. These take the place of hindwings and helps balance the insect in flight.

a modified wing that is reduced to form a 'drum stick' shaped balance organ. Read more on: Haltere

Vestigial wing on the metathorax of a fly of the order Diptera; necessary for balance during flight. halzoun

Sense organs found in Diptera on the second thoracic segment, evolutionarily derived by modification of the wings. They are used to help balance during flight.

(n) either of the rudimentary hind wings of dipterous insects; used for maintaining equilibrium during flight

the structurally and functionally modified hind wing of Diptera (true flies).  The haltere is a balancing organ used to maintain stability during flight.  Halteres vibrate at the same frequency as the forewings but in anti-phase (i.e. when the forewing is up, the haltere is down and vice versa).

A modified hind wing of a fly (Diptera), acting to maintain flight stability. Haplodiploidy:

One of the club-shaped 'balancers' found on each side of the metathorax among the true flies (Diptera). They are the much-modified hind wings. Hamuli.

     one of the balancing organs in dipteran flies, these club shaped organs are the modified rear wings. Hamuli:

in flies, the reduced hind wings.  These structures act as gryroscopes and give flies their remarkable flight abilities.