Overheard in the hallway:

Human 1: "A friend of mine claims he saw a Swainson's Hawk on a telephone pole last week."

Human 2: "That's funny, they're all in Argentina right now. What did you tell him?"

Human 1, in a Valley Girl voice: "Swainson's Hawks are sooo last season! But Rough-Legged Hawks are totally in right now!" 

Humans 1&2: Laughter