Passive flight

1.Flight, such as gliding and soaring, accomplished without the use of motive power.
Webster's Revised Unabridged Dictionary, published 1913 by G. & C. Merriam Co.
References in periodicals archive ?
Passive flight intercept trap catches revealed that preferred flight height and thus optimal trap placement for monitoring populations was close to the base of the dominant/co-dominant northern red oak, Quercus rubra L., canopy.
Passive flight intercept traps were located in 3 general geographic areas experiencing high levels of tree mortality (UTM Zone 15-N NAD83: Fly Gap-0431660, 3954978, White Rock-412668, 3949429 and Oark-0450792, 3952369) in the Boston Mountain, Pleasant Hill, and Buffalo Ranger Districts of the Ozark National Forest (Fig.