Science magazines
- Harperella
- Harpy Eagle
- Hartweg's Golden Sunburst
- Hau Kuahiwi (Hibiscadelphus giffardianus)
- Hau Kuahiwi (Hibiscadelphus hualalaiensis)
- Hau Kuahiwi (Hibiscadelphus woodii)
- Hawaii Creeper
- Hawaiian Bluegrass
- Hawaiian Common Moorhen
- Hawaiian Coot
- Hawaiian Crow
- Hawaiian Duck
- Hawaiian Gardenia
- Hawaiian Goose
- Hawaiian Hawk
- Hawaiian Hoary Bat
- Hawaiian Monk Seal
- Hawaiian Red-flowered Geranium
- Hawaiian Stilt
- Hawaiian Vetch