The birds that don't eat and eat and eat are polite. Well, not really, but I used to have a customer who decided that chickadees were "polite birds" because they typically take only one seed and go.

A: I have long wondered why myself. First the reason why: Black-capped chickadees do not have powerful bills and must hammer away at sunflower seeds, and other seeds as well. They could hammer away at ...

To communicate without words, humans use a host of gestures—whether a wave to wish someone goodbye, a thumbs-up to indicate approval or “flipping the bird” to suggest something far less polite. While ...