Rocky meanwhile has all the potential to become an excellent truffle dog. Except for his weakness for eating his finds.

— Giovanni Monchiero teaches dogs to sniff out truffles in Roddi, Italy. Read more at 'For the dog, it's a game': sniffing out truffles in Italy at Yahoo, or watch the video, or listen to this 10 minute BBC radio spot from early last year.

Furthermore, the researchers found that chimpanzees sniffed longer at the odor the more closely related they were to the odor donor, providing the first evidence for odor-mediated kin recognition in non-human great apes.

— Read more at Chimpanzees sniff out strangers and family members at Science Daily.

We show that in species that specialize on seed dispersal by lemurs—an olfactorily oriented primate—fruits increase scent production and change their chemical composition significantly more than sympatric species whose seeds are largely dispersed by birds.

— Read more at Fruit scent as an evolved signal to primate seed dispersal at Science Advances.

Scientists at the Max Planck Institute for Chemical Ecology used behavioral experiments to show that desert ants are able to quickly learn many different food odors and remember them for the rest of their lives. However, their memory for nest odors seems to differ from their food odor memory: Whereas food odors are learned and kept after a single contact, ants need several trials to memorize nest odors.

— Read more at Desert ants have an amazing odor memory at Science Daily.