The Collectors

"I've caught another one!" Elizabeth shouted.
"Well done," her father replied. "How many have you got now?"
"Seventeen."
"That's two more than I have."
"They are funny little things, aren't they?"
"Yes, Elizabeth, they're quite peculiar."
Elizabeth peered into her jar. "I can't tell which ones are male and which are female."
"It's not easy but with a little experience you'll soon be able to. When we get home I'll show you how to asphyxiate them and you can put them in your new display cabinet."
"Daddy, what did you say they are called again?"
"Humans, Elizabeth, they're called humans."