You like rocks? He'll get you rocks. You briefly mention it's cute that crows bring shiny objects as gifts? He's already brought you a handful of them from around the base. You like his wings? Now you have a feather he molted.

With his usual lack of explanation, it's difficult to tell if he's flirting or just really enjoys gift-giving. Whichever the case, his gestures is clunking up your desk. It's difficult to explain why most of your decorations are everyday rocks.

You already hear the familiar rustle of feathers rounding the corner. When he comes into view, he's already waving at you with a flower in hand this time.