When Chestnut-sided Warblers are intent on feeding, they are very intent. I am glad, all things considered, that this Chestnut-sided at Magee Marsh Wildlife Area on the Erie Shore in Ohio, was intent on small insects and not on me. That is a very fierce look. Sony RX10iv at 600mm. Program mode. 1/500th @ ISO 800 @ f4. Processed in Polarr.