The picture below features three Hawaiian Monk Seals (Monachus schauinslandi). I took that picture yesterday. If current population estimates for the species are accurate, the picture includes 0.3% of all living members of the species. (click to embiggen)
Let's try to grasp that. If I take a picture of my daughter and her two closest friends, that picture will represent a smaller percentage of the total population of her high school. If I wanted to use the same camera (Canon 60D, if you're curious) to capture the same fraction of living humans, I'd have to fit more than 300 people in every available pixel.
These guys are really endangered. The population has really been growing, but it's far from safe - particularly with the debris field from the recent tsunami heading for the area where the bulk of the population lives.