Birds have wings; they're free; they can fly where they want when they want. They have the kind of mobility many people envy.

Vultures are homely, but they clean up all the garbage and that's good. And they're elegant in the sky.

Birds ... are sensitive indicators of the environment, a sort of "ecological litmus paper," ... The observation and recording of bird populations over time lead inevitably to environmental awareness and can signal impending changes.

Birds are, perhaps, the most eloquent expression of reality.

The more you look, the more you will see.

Penguins are an indicator of the health of our watery planet, and if they are unable to survive, we had better take notice or we might find our own survival threatened.

The other creatures with which we share this world have their rights too, but not speaking our language, they have no voice, no vote; it is our moral duty to take care of them.