Ni'ihau 'alohas'
makaloa,  lei pupu,
naval missile tests

Hawaiian Monk Seal
critically endangered species
found in high numbers

Regular droughts
Evacuate to Kaua'i
Rainfall replenishes

Ipu art creations
Mele a cappella
Limited tourism

Commentary box too small for this sorry...

Vocabulary used:-

Ni'iahu - pronounced /ˈniːhaʊ/ in English. Located just off the coast of the island Kauai, this private island is the only place where Hawaiian language is spoken on a daily basis.

makaloa - (taken from wikipedia) the art of Hawaiian mat–weaving made famous by the people of Niʻihau. Makaloa (Cyperus laevigatus), a native sedge, used to grow on the edges of Niʻihau's three intermittent lakes.[16] The stems were harvested and used to weave moena makaloa (mats), considered the "finest sleeping mats in Polynesia". The mats were valued by aliʻi and foreign visitors alike, but by the end of the 19th century, Hawaiians had stopped weaving makaloa due to changes in population, culture, economics, and the environment.

lei pupu - (taken from Wikipedia) Niʻihau shell leis used for exquisite jewellery. The sale of shells and shell jewelry is an additional source of income.[24] Its beaches are known for their pūpū, tiny shells that wash onto shore during winter months. Species used for shell leis includes momi (Euplica varians), laiki or rice shells (Mitrella margarita) and kahelelani (Leptothyra verruca).[25] The shells and jewelry are so popular that Governor Linda Lingle signed a bill in 2004 to protect lei pūpū o Niʻihau (Niʻihau shell leis) from counterfeiting.[26] A single, intricate Niʻihau shell lei can sell for thousands of dollars.

ipu art - (taken from wikipedia) a form known to have developed solely on the island of Niʻihau.[37][38] In this method, after a design is carved in the skin of a fresh gourd, it is filled with dye which, after several weeks, changes the color of the uncarved portions of the surface where the skin is intact.

Mele - sing/song

Hawaiian music -(Taken from Wikipedia) Hawaiian music plays a central role on the island, with a cappella singers making use of only two or three tones and changing rhythms. Ukulele and guitar playing is nearly ubiquitous among the islanders, and there are three separate styles of slack-key music, with an older style originating from Kohala.
Naval detailing (taken from Wikipedia)
Approximately 80% of Niʻihau's income comes from a small Navy installation atop 1,300-foot-high cliffs. Remote-controlled tracking devices are used for testing and training with Kaua'i's Pacific Missile Range Facility. Modern missile defense tests are conducted at the site for the U.S. and its allies. The installation brings in millions of dollars a year, and provides the island with a stable economic base without the complexity of tourism or industrial development.

Find out more from linking here: "http://en.wikipedia.org/wiki/Niihau"