An endangered species is a species of organisms facing a very high risk of extinction. The phrase is used vaguely in common parlance for any species fitting this description, but its use by conservation biologists typically refers to those designated Endangered in the IUCN Red List, where it is the second most severe conservation status for wild populations, following Critically Endangered.
I measure my happiness 2 ways. 1  Through a (random and irregular) process of self reflection.  2 Catching myself being happy and remembering the last time I caught myself being happy and trying to determine the time between them.
A Definition of Happiness. Possibly the best place to start defining happiness is by defining what it is not. Many people believe that happiness is having fun at a party, the excitement of new experiences, the thrill and passion of sex, or the delights of a fine meal. These are all wonderful experiences to be cherished and cultivated but they are not happiness.