(CNN) Behold the delightful kākāpō, a flightless bird that holds the honor of being the fattest kind of parrot in the world. These roly-poly land angels are native to New Zealand, and unfortunately, they are also critically endangered: Up until recently, there were only 147 of them. They only mate every few years when a particular tree, called a rimu tree, puts out an abundance of fruit. When you have a critically endangered population of precious green potatoes and a country deeply invested in making sure they survive, breeding season becomes an all-hands-on-deck affair. Scientists not only work to encourage kākāpō mating, they also help incubate and monitor eggs and nests.

Source: CNN April 19, 2019 16:07 UTC