Buff-tailed coronets are very aggressive hummingbirds; I photographed these mainly at Rio Blanco Lodge near Manizales, Colombia.   There were several other hummingbirds attending the feeders, including long-tailed sylphs and tourmaline sunangels, but the buff-tailed coronets drove them all away almost as soon as they arrived.

• Canon 7D or 7DII; 800 mm IS lens + extension tubes or 1.4X extender or 70-200 F4 IS lens with extension tube, fill-in flash (2015)