An island supports fewer kinds of animal than an equal area of mainland, and the shortfall grows with dist from t shore. T forces s the num. Arrivals a rarer o a rem island bec few trave cross the water, and losses are commoner on a small one because each population is thin enough to be wiped out by a single bad year. The species list stays roughly steady while its membership changes.

Type only the missing letters. Each box is one letter, and the number of boxes matches the letters that are missing.