The moa were large flightless birds endemic to New Zealand. They have been extinct since about the 1600-1700s. There were several species and sizes. The tallest moa was 1.8m to the highest point on its back.
The extinct Giant Moa: Kingdom: Animalia Phylum: Chordata Class: Aves Order: Dinornithiformes Family: Dinornithidae Genus: Dinornis Species: Dinornis novae zealandiae (North Island giant moa) Dinornis robusta (South Island giant moa).
MOA is the abbreviation for "minute of angle". It is a measure of angle at a given distance. 1 MOA equals 1 inch at 100 yards. A scope that is 1/4 MOA would move the bullet impact 1/4 inch per click of adjustment at 100 yards.