Leafcutter bee (Rhodanthidium siculum) foraging on round-headed knapweed flower (Centaurea sphaerocephala), Algarve, Portugal, Europe

Round-headed katydid (bush cricket) (Amblycorypha), earhole in forelegs, superb leaf mimic with leg scraping song, Guanacaste, Costa Rica

Round-headed Leek (Allium sphaerocephalon), detail, Germany, Europe