flightless

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Related to flightlessness: Flightless Birds

flightless

(of certain birds and insects) unable to fly, having secondarily lost the ability. The term is usually applied to birds such as RATITES and penguins.

flightless

see ratite.
References in periodicals archive ?
Flightlessness in birds including various pigeons often develops on islands.
Flightlessness and fear of flying in island species.
This ensemble of traits has been named the Chemical Defense Syndrome (CDS), and includes chemical defense, visual, chemical, and/or mechanical (tactile or auditory) warning signals (aposematism) and threat displays, aggregation, exposed diurnal behavior, flightlessness, sluggishness, and large size (Whitman et al.
However, there is abundant evidence that certain evolutionary transitions are more likely than others, such as shifts from diploidy to polyploidy in plants (Stebbins 1950) or the evolution of flightlessness in island-inhabiting birds (Carlquist 1974), compared to the reverse changes.
Flightlessness in the Galapagos cormorant (Compsohalieus |Nannopterum~ harrisi): heterochrony, giantism and specialization.