You might ask, why would a sibling do this? It's what they do. I returned the favor by sending a lovely blog URL to her that was filled with mice (fabricated, artificial ones) in various poses emulating human activity. Mice reading, mice doing dishes, mice catching butterflies in nets. You guessed it. She has a mouse phobia. I was delighted and couldn't wait for her to open her email. Keep in mind that if I thought this would send her into a traumatic state, I would never do it in a million years. It was just enough to make her groan, shield her eyes, and wonder what she could find to send me in revenge.
Sisters. They know our fears, secrets, and joys. The bird email didn't say, "I want to cause you nightmares over this thing you fear so much." To me, it said, "Thought of you today and thought we could laugh together at your expense." (That is right, isn't is sis?) Pranks at a safe email distance, I can certainly handle. But don't you come near me with a real bird.