Bill short, robust; its upper outline decurved from the base; cere short, bare; edge of upper mandible with a festoon and a prominent angular process.
Bill short, subconical; upper mandible curved at tip and bending over lower one, which is nearly straight; the edges of both somewhat inflected and not notched.
Sooty brown, lighter below; region about base of bill whitish; upper mandible broad and rounded at its base.
Bill strongly hooked and with a distinct cere at base of upper mandible.
Bill not strongly hooked and without a cere at base of upper mandible.
The above list will hopefully provide you with a few useful examples demonstrating the appropriate usage of "upper mandible" in a variety of sentences. We hope that you will now be able to make sentences using this group of words.