Endangered species Puns

I guess they just find them irrelephant.

I like them medium rare.

Until the recent discovery that there's actually a lot more out there. They just comb over.

Me: It says here white rhinos are now on the endangered species list. Dad: Pretty sure that's by invitation only.

He then laughed for five minutes. Half an hour later, leaving from dinner...he remembered what he said. And laughed again.

"Why are they called right whales"

"Because they all left?", I responded

For some background: Right whales are an endangered species and they are called right whales because they was the right whale to hunt.

EDIT: The reaction of my professor was her dropping her head in embarrassment with a smile. Some groans and laughter were had among the students