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The line graph illustrates how many breeding pairs of four different types of wild bird in Canada from 1992 to 2006. Overall, the populations of breeding pairs of mallard and Canada goose both increased dramatically while the numbers of American black duck and blue-winged teal remained relatively stable over the period. In addition, the number […]
The line graph compares the population trends of four distinct species of four wild birds in Canada from 1992 to 2006. Overall, the population of mallard and Canada goose witnessed an upward trend while the opposite was the case for American black duck as well as blue-winged teal. Among the four, the number of mallard’s […]