This is Adventure (aka Love).
I was dog sitting for a very low-key golden retriever named Holly. She seems pretty uninterested in the birds all weekend, so I kept them in their cage on the table with the cage doors closed the whole time. Holly would glance over whenever they made a loud noise, but then she'd just continue on with whatever she had been doing previously.
However, on one of the last nights, there was some mischief. I'm not sure if it was dog or bird, but some stinker learned how to slide the cage doors up. I woke up the next morning and Holly was sleeping on the floor in the bedroom doorway as usual. I went out to the living room, and Morpheus was sitting there on the TOP of his cage...on the OUTSIDE of it!! I was like "Whew! I'm glad Holly left him alone and he's ok!" But then I realized that there were only three other birds inside the cage, not four.
I searched around the house, thinking that Adventure was just hanging out somewhere else like they so often do (and they're not trained to come when I call, so it's normal for me to call for them and get no response). But after searching the house for like four or five minutes and not finding Adventure and not hearing him either, I started to freak out. That's when I noticed a few feathers at the top of the steps. Then I saw the pile of feathers at the bottom of the steps. I was hoping that he had just maybe hopped and tumbled down the stairs, losing some feathers in the meantime, but I couldn't find him still. Then I found his leg band in the pile of feathers, and that's when I knew.
Holly had eaten Adventure. It was both funny and sad at the same time. I had only had Adventure for a little while, so we hadn't formed a close bond yet, but it was still kinda sad.
I saved up all of his little feathers in a ziplock baggie, and I clipped his leg band on the wire of the birdcage (later the birdies chewed it until it smashed).