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Amistad National Recreation Area Trees
The variety of tree and shrub species living here is astounding. Nearly a dozen species of acacia can be found in the area. However, the difference between a "tree" and "shrub" is difficult to define around Amistad. The size of many species of woody plants depends greatly on the local availability of water and the age of the plant. Mesquite trees grow to more than 20 feet in some areas, but elsewhere are stunted to only a few feet.
Maine ocean islands provide the only nesting sites for Atlantic puffins in the United States. Eastern Egg Rock in the midcoast region, Seal Island and Matinicus Rock at the mouth of Penobscot Bay, and Machias Seal Island and Petit Manan Island off the downeast coast provide habitat for more than 4,000 puffins each summer.