Hawaiian tropical dry forests

The Hawaiian tropical dry forests are a tropical dry broadleaf forest ecoregion in the Hawaiian Islands. They cover an area of 6,600 km² on the leeward side of the main islands and the summits of Niʻihau and Kahoʻolawe. These forests are either seasonal or sclerophyllous. Annual rainfall is less than 127 cm and may be as low as 25 cm; the rainy season lasts from November to March. Dominant tree species include koa, koaiʻa, ʻakoko, ʻōhiʻa lehua, lonomea, māmane, loulu, lama, olopua, wiliwili, and ʻiliahi. Endemic plant species in the dry forests include hau heleʻula, uhiuhi, and Gouania spp. The palila, a Hawaiian honeycreeper, is restricted to this type of habitat. ()