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.
Happiness is more positive than comfort, enjoyment, or satisfaction, more serene and rational than pleasure; pleasure is of necessity transient; happiness is abiding, and may be eternal; thus, we speak of pleasures, but the plural of happiness is scarcely used.