Here is a Red Crested Cardinal, shot handheld with the 300mm f4, attached to a 1.4 teleconverter from Kenko. I kinda like this converter.
https://farm8.staticflickr.com/7285/...f72d3426_o.jpg https://farm8.staticflickr.com/7628/...7e54c696_o.jpg
And a Northern Mockingbird, singing his heart out
https://farm8.staticflickr.com/7615/...4e7fa61d_h.jpg
Finally a Zebra Dove
https://farm9.staticflickr.com/8716/...48279118_b.jpg