I photographed all 3 while wondering around Kissena Park here in New York City. All 3 were taken by waiting for them to come closer after spotting them. In the case of the titmouse it surprised me by coming too close to fit in the frame. I took the first with it's feet cut off and as I recomposed to captured the feet could not include it's crown. In post I put them together for a little nicer composition. I also removed a small twig that was Infront of the cardinals eye.
Comments and suggestions welcome,
Morris

1) Northern Cardinal
X-H2S NIKON AF-S NIKKOR 500mm f/5.6E PF ED VR lens 500mm f/5.6 1/150s 800 ISO 0.0 EV

2) Carolina Chickadee
X-H2S NIKON AF-S NIKKOR 500mm f/5.6E PF ED VR lens 500mm f/5.6 1/200s 800 ISO -0.3 EV

3) Titmouse
X-H2S NIKON AF-S NIKKOR 500mm f/5.6E PF ED VR lens 500mm f/5.6 1/170s 800 ISO 0.0 EV