Where have all the birds gone? : nature in crisis
"Birds are nature's essential workers, crucial members of ecosystems around the world. And they are disappearing. Since 1970, nearly 30 percent of all birds in the United States and Canada have vanished, due to city lights and tall glass skyscrapers; domesticated cats prowling outdoors; pesticides, and climate change. In short, due to humans. Hirsch helps readers discover the impact birds have on our world-and explain how you can help save them."...