bird_nest_vireo_weaver (by dmuren)
We humans have it pretty good. Blessed by evolution's wheel of fortune with binocular vision, seriously honkin' brains, and opposable thumbs, we've turned ourselves into the uncontested tool leaders of the animal world. Those tools enhance our capabilities more than any claws, fur, or antennae could. We move faster, fly higher, change the courses of rivers and even affect the temperature of the atmosphere. All this can give a mammal a pretty big head -- big enough to think that without us to save it, nature is somehow in danger.