Skylarks
Half a dozen skylarks, taken across a few different days.
Not always easy to spot (unless perched on a post), but relatively patient subjects, so I figured I'd try using a 1.4x teleconverter on the second visit, requiring manual focus and thus a tripod.
Whilst the birds seemed content to wait around whilst I setup, it was windy enough that focusing was frustrating. I don't know to what degree poor technique/equipment/conditions/luck affected matters, but ultimately the effort involved did not translate to better images, confirming my previous view that the teleconverter isn't worth it.