Which animals could be extinct by 2050?

There have been five mass extinctions in Earth’s history and numerous experts have warned that sixth mass extinction could already be underway due to human activity since the Age of Exploration. Some scientists have even suggested that almost 40% of the species (opens in new tab) currently living on our planet may be extinct as early as 2050.

But is this just a worst-case scenario? Is such a dramatic decline in? Soil‘s kind likely to happen?