It’s Humbug
Thinking he would play a trick on the biology teacher, Alec glued a beetle’s head to a caterpillar’s body and very carefully attached some butterfly wings, ant’s legs and a fly’s tail. The teacher was very impressed.
“I’ve never seen anything like this, Alec” he said. “Tell me, did it hum when you caught it?”
“Why yes, Sir. Quite loudly.”
“I thought so. It’s a humbug.”