Not necessarily your best photo, just the moment. And because we're all friends here, the worst one too.
Mine: best was back in July, a pair of Carolina wrens raising a second brood in an old boot I'd left on the porch, right outside the kitchen window. I watched the whole thing up to fledging day with the 180-600 resting on the windowsill and a coffee in my other hand. Worst: set up for the Christmas Bird Count at 6am in the snow and realized I'd forgotten to charge either battery. Either! Counted birds with my eyes like it was 1950.
Your turn!