(Female Pileated Woodpecker)
This converter: http://www.bhphotovideo.com/c/product/53109-REG/Tamron_AF14C700_1_4x_Teleconverter_for_Canon.html Additional 120mm of zoom doesn't show because this teleconverter does not communicate that information with the camera.
There was considerably flare from internal reflections between the two window panes that this was shot through. Lots of Photoshopping created more contrast.