Not sure how you would get a Hummingbird head shot since this is almost minimum focus length so
I am including it in monthly theme and the mods can ignore it if they wish.
For reference, the buds on the branch are about 1/8" diameter.
I have very tame hummingbirds....
D610, f6.3, 600mm (300 w/2x), 1/320, iso1600, handheld.
DSC_7451-bp.jpg