Although, the gear they used to take Neuro's head shot, wouldn't be convenient to get the image of the Grebe... But it would matter... It would matter because if you tried it, you'd not get the image... but it's great technology and very expensive "gear"...Let's get back to the fundamental principle here.
A great shot from a A1400 from a never attempted perspective very close to an animal very difficult to do so, would destroy anything ever done by any super-tele + $$$$$ 1D combo. That's the principle. It's Irrelevant how its done, but that's what makes a better picture. The photographer.
And it would destroy a close shot with a 5D3+some short lens too? Even if it was some stunning dark evening crazy glow lighting and the large sensor of the 5D3 captured more light and gave it some radical low DOF pop???