Hey guys-

I also noticed something weird with the bill in my pictures of the Grebe. 
If you'll look at the third picture on my site (the one where he's eating a
fish), you'll see that on the upper half of the bill is a small protrusion,
which I really doubt to be his tongue.  
Anyway, it would be interesting to find out what it is.

Good birding,

Nico Sarbanes 
Baltimore