Pigeon (Columba livia)
The Grey Parrot Anatomy Project has been established in part to improve upon and create technology that allows the world to study anatomy of any animal. While the focus is on the grey parrot, the methodology being developed has already been used on birds, mammals (including humans), reptiles and more. One of the advances has been the development of BriteVu®, a new contrast agent that allows researchers to see vasculature (with the aid of a CT scan) down to the capillary level. In this pigeon perfused with BriteVu®, the collar plexus of the neck subcutaneous veins is just visible at the bottom of the picture. This vascular plexus helps the pigeon thermoregulate by having an extensive blood supply close to the skin.