"We come in peace! We only want to study you! Of course, that does mean we'll need to dissect a few of you. But probably not more than a few thousand or so!"
"Oh, look at the cute bipeds! How adorable! I'm going to take this one back with me and give him a nice home! You're so cute, you widdle thing! Yes, you are!"
"What great luck, Commander! This indigenous protein source will allow us to avoid depleting our on-board food stores!"
"Yes, Leader, we encountered a fascinating, intelligent life form on the third planet in the system. But then Ensign Snorknozz here sneezed on them and they all died!"