an animal that gives birth to live young, not eggs, and feeds its young on milk a mammal to move smoothly and quietly through the air or over a surface to glide covered with soft hair or fur furry a thin piece of skin that covers or connects parts of a person's or animal's body a membrane a place made by birds or animals to lay eggs or take care of their babies a nest to provide enough of what something or someone needs in order to live to sustain something or someone making you feel slightly frightened or worried about your ability to achieve something daunting feelings of anxiety or worry before flying pre-flight nerves https://339efcb25eb75e967b0d-ff8eeadd950d51fd1fc939dca75b3973.ssl.cf1.rackcdn.com/assets_default.swf