"We're concerned many species won't be able to move quickly enough."—Shaye Wolf, climate science director at the Center for Biological Diversity, quoted in a heartbreaking and terrifying article in the Washington Post about plants and animals migrating "to higher altitudes and latitudes as temperatures climb" as a result of global warming.
I have seen new birds and insects the past couple of years, and I've started to notice some familiar species of plants and animals doing things at a different time of year. These changes to ecosystems are happening fast enough that they're easily observable. That is not good news.