Nearly A Third Of Birds In U.S. And Canada Have Disappeared Since 1970

The video discusses the alarming decline of bird populations in Canada, with nearly 3 billion birds lost. A study published in the journal Science highlights that the current extinction rate is 1000 times higher than pre-human times. The National Audubon Society attributes this decline to human activities such as deforestation and pollution. The organization's president emphasizes the interconnected fate of birds and humans, urging immediate action to address this environmental crisis.

According to the authors of the study, why is focusing only on extinct species insufficient?

What message does the text convey regarding the natural world and human activities?