Twenty-two percent of the southern pine beetles, Dendroctonus frontalis Zimmermann (Coleoptera: Scolytidae), that landed on the bark during the 1st 4 days of mass attack in East Texas, eventually entered the tree. Other beetles either flew away (43%), dropped off the host (32%), or were eaten (2%). No significant difference in searching time or distance traveled was found for day of attack or beetle sex. Males spent significantly less total time on the bark than females.
Coster, Jack E.; Bunt, W.D.; and Johnson, P.C., "Behavior of The Southern Pine Beetle on the Bark of Host Trees During Mass Attack" (1980). Faculty Publications. 312.