We all know about birds that migrate. Many other species migrate as well, including some fishes and butterflies. Read stories here about animals that migrate, either seasonally or as part of a larger shift in response to climate change
Climate change includes both global warming driven by human-induced emissions of greenhouse gases and the resulting large-scale shifts in weather patterns. Though there have been previous periods of climatic change, since the mid-20th century humans have had an unprecedented impact on Earth's climate system and caused change on a global scale.