Hey, did you know that it is proposed to make a whole sub class of fossil birds called Odontornithes- birds with teeth? Yep. One group is Ichthyornidae. Check out this site for more info on this example, it is an adult, and it is a bird, and it has teeth:
Birds with Teeth
What you have linked to there is another example of transitional fossils. As that website says:
quote:
The fortunate discovery of these interesting fossils is an important gain to paleontology, and does much to break down the old distinctions between Birds and Reptiles, which the Archæopteryx has so materially diminished.
Do you know of any modern birds that have true teeth?
SWC writes:
We don't see any evolving "transitionals", but we see them complete, as Creationists would expect.
If you mean that there will be no non-functional "hopeful monster" transitionals, that's what evolutionary theory would predict, too. The idea that a transitional organism would be "incomplete" is a creationist strawman that is specifically NOT predicted by evolutionary theory.