These things are tiny. And 500mm on FF is short. And these things are flighty. I waited for them for a VERY long time and finally today I got them - probably after about 400 shots between yesterday and today, they moved closer (still at a 50%crop). Didnt manage to get the parents in a decent shot. They were sitting in shade - so lots of ISO here
Juvenile Malachite Kingfisher. Note the beak is black - in adults it's bright orange