Sniffer is an animal from Xanth. Its talent is sniffing and telling if someone has magic. It was first introduced in A Spell for Chameleon.
Sniffer is a quadruped about knee-high with a long limber snout.
Novels: A Spell for Chameleon, The Source of Magic
Human men and women will not have a species in their entries. Also, if the surname of the character is the character's species, it was dropped.
If the character is a child, it will be in the description. The child will more than likely be an adult by this time in the Xanth series.
Many species are single gender, so their entries will not mention it. The species are Fury, Muse, basilisk, cenmaid, cenmare, cockatrice, dryad, maenad, sand witch, sandman, and woodwife. Harpies and nymphs are usually female, and fauns are usually male; but there have been a few exceptions that are noted.
In some instances, I have made educated guesses on gender, species, and some birth years.