Griffons are Extinct?

After Highgate I headed back to the Natural History museum in Kensington to buy some drinking chocolate (they had some nicely packaged slabs of it in the gift shop that I figured would be ideal for gifts). I paused to take some pics of the building's amazing architecture on my way.

 

These look kind of like Griffons. They can't be, but that's what they resemble.

Done