<TABLE cellSpacing=0 cellPadding=0 border=0><CENTER> Xantus Hummingbirds </CENTER> Hummingbirds fly like little helicopters. They can hover, move from side to side, go straight up, straight down, and even backwards. They do all this by rotating each wing in a circle, which is similar to the way a helicopter flies. Because they can maneuver so well around other birds, they have no fear of predators. These feisty little birds will even attack eagles if their babies are in danger—and they are not too shy to pluck fuzz off our sweaters to build their nests.
Yaks All wild cattle have a keen sense of smell, and the yak is no exception. Yaks are constantly sniffing to collect information about each other, their enemies, and food sources. Males spend a great deal of time watching other males to assess their ability to fight. They use posture and movement to challenge each other, because they don't have enough facial musculature to change their expressions. Often the challenges are between yaks of unequal strength: that way the weaker one can back down, and neither yak gets hurt.
