We have been quite lucky to be able to closely examine a broad range of ages, from juveniles, almost surely straight out of the nest, to the beautiful adult below.
With such a run, it has been easy to observe the differences in bill development between the ages. It is quite interesting to see and compare the development of structure, colour, and even strength, so up-close and personally.
Adults also have far better bill-eye-hand coordination.
Amidst requests to "take that thing off my finger, pleease" during processing, we have had many opportunities to see the amazing appendage-like tongue that is possessed by these creatures.
Serrations are verified.
And this little guy. Not caught in Tortuguero. Didn't show his tongue. But Richard didn't want this to end on him being bitten.
~ Author Pauline Pearse (Richard's Aracari-bill opener when the bites hurt)