they don't...
a bib is a little white bit on the underside of their nose, it looks almost like teeth
The rose-breasted grosbeak.
"Bib" is a noun and, as such, does not have a superlative form.
.bib is a file extension
A bib
126.7 approx
bib
Babero means bib
The apostrophe goes before the "s" in "baby's bib" to show possession. This indicates that the bib belongs to the baby.
Red head and black body bird
baby bobs bib( the bib has a b on it 4 bob) right after he threw up (on his bib)
gray-colored and black plume on top of its head and black bib with white stripe under the beak.