Distribution and Numbers of Common Terns on the Lower Great Lakes during 1900-1980: A Review In the lower Great Lakes area at least 58 Common Tern (Sterna hirundo) colonies, each containing 50 or more nests, have existed during 1900-1980 or were st... CH Blokpoel - 《Colonial Waterbirds...
17.Because of the Great Lakes,they learned,Canada has more fresh water than (63)any (64)other( 65)country in the world.In fact,it has one-third of the world's total fresh water,and much of it is in the Great Lakes. 试题答案 ...