Alexander Henry Haliday was an Irish entomologist. He is primarily known for his work on Hymenoptera, Diptera, and Thysanoptera, but worked on all insect orders and on many aspects of entomology.
Alexander Henry Haliday
Haliday's grave
Thrips are minute, slender insects with fringed wings and unique asymmetrical mouthparts. Entomologists have described approximately 7,700 species. They fly only weakly and their feathery wings are unsuitable for conventional flight; instead, thrips exploit an unusual mechanism, clap and fling, to create lift using an unsteady circulation pattern with transient vortices near the wings.
Thrips
Typical Tubulifera thrips: the feathery wings are unsuitable for the leading edge vortex flight of most other insects, but support clap and fling flight.
Leaf suffering from thrips
Asymmetric mouthparts of Heliothrips