Definition that contains greg
- starling gregarious birds native to the Old World
- chinchillon gregarious burrowing rodent larger than the chinchillas
- sturnus vulgaris gregarious bird having plumage with dark metallic gloss; builds nests around dwellings and other structures; naturalized worldwide
- lagostomus maximus gregarious burrowing rodent larger than the chinchillas
- ectopistes migratorius gregarious North American migratory pigeon now extinct
- viscacha gregarious burrowing rodent larger than the chinchillas
- passenger pigeon gregarious North American migratory pigeon now extinct
- common starling gregarious bird having plumage with dark metallic gloss; builds nests around dwellings and other structures; naturalized worldwide