Quote:
Originally Posted by Dogs  Much more developed in some than in other species.... all depends on feeding requirements..
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This is so indeed. Some species the sense of smell is little developed but in others, notably
procellariformes such as Fulmar, the shearwaters and petrels, all have a very highly developed sense of smell. They are primarily palegic spending most of their lives at Sea so their sense of smell helps them to find food. They have exterior tubular nostrils which lie on the surface of the upper mandible hence known as 'tubenoses'. Also the tubenose helps to excrete salt from stomach, and in the case of Fulmar, to eject contents of oil from stomach (youngsters do this as a defence).