A little girl watched the butterfly, flap around carelessly and freely for a few passing moments. Out of the corner of her eye, she also noticed a black bird, or rather, a crow. In a moment the crow swooped down, eating the butterfly, one of the wings fluttering down, landing right atop her head.
"Oh." Was all the little girl said, as she watched the death of something so beautiful right before her eyes. What a tragic sight for a five year old to witness.
(I got bored, and figured I practice describing things better in my writing.)