Half-sphere custom, suction-cup feeder for small birds (titmises, sparrows, nuthatches, bullfinches).
I recommend to mount on clear window glass, applying some soap solution.
Also use emergency-cord to prevent losing.
Material - green petg,
no supports (if model is placed as on slicer preview and resolution is 0.1 or 0.15;
lower resolution will, probably, require supports).
Infill i did 50%, you can try less, but select a robust infill type (hex, cube, etc..).