H. giganteus explained

H. giganteus may refer to:

• Hagryphus giganteus, an oviraptorosaurian theropod dinosaur species from the Upper Cretaceous Period of what is now Utah
• Helianthus giganteus, the giant sunflower or tall sunflower, a plant species native to the eastern United States
• Hemidactylus giganteus, the giant leaf-toed gecko, a lizard species found in India
• Herpetosiphon giganteus, a bacterium species
• Hirundapus giganteus, the brown-backed needletail, a large swift species