World Wide Fund for Nature
More than 60,000 species are currently living. Many of them are in trouble, according to the world's first global trees database.
The initiative involves 7,000 cities across 172 countries.
Despite international efforts to save the vaquita, more than 90 percent of its population has been lost since 2011.
Federal officials warn that unless we reduce carbon emissions, the beloved species could be doomed.
WHAT'S HAPPENING
There are fewer than 60 of the planet's rarest marine mammal. Scientists hope their capture plan will change that.