winter as well.
B. Many pesticides (农药) are highly poisonous to birds. They either kill the birds or destroy their hormones (荷尔蒙),causing them to fail to nest. In the 1990s, for example,researchers
discovered
that
thousands
of migratory Swainson’s birds were poisoned by pesticides
in Argentina.
C. I am optimistic because tens of millions of people in North America love birds and nature. Being careful consumers and supporting conservation groups will help make a huge difference.
D. We don’t think so, but it’s hard to tell if a wild bird is happy or not- or whether it even experiences that emotion. However, we know male birds do it as a warning to keep other males away from their mates and the area that they consider as their own or to impress females.
E. My favorite expression is:
“Do what you love; love what you do.” My family thought I was strange to be interested in birds. But now I have an interesting job. My research has taken me to lots of amazing places and I am helping to save nature and teach people how to save their environment.
F. Songbirds are telling us that the environment can’t bear our lifestyles.Governments need to protect forests and natural areas,ban dangerous pesticides, provide encouragement,buy more fuel-efficient cars, and build great public transportation systems.
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