The smell will stay with the sparint for some time. For people fascinated by animal behavior, otters have long been a source of curiosity. Each otter has its own unique spraint scent, almost like a fingerprint. Why collect it? Spraint comes in all shapes and sizes depending on the type of prey they have been eating and age and sex of the otter. Green and Monick, Journal of Ethology, found that otters actually spend more time, standing, sniffing, and rubbing at spraint sites than just pooing. It’s so aromatic, it has its own name: spraint. Eyesight is probably the most important sense for hunting. Every otter can eat 15% of their weight on a daily basis because they have an extra-fast metabolism. Also contains what appear to be mammal bone fragments and none of the fish scales and bones that I normally see in otter spraint. Otters are great moms! It was quite small (about 7cm x 1 cm) and seems twisted at the end. The spraints are often made of food waste; however, otters have anal glands that secrete the ‘otter-like’ smell. I did try giving it a sniff, but couldn't really smell anything, but then I've got a bit of a cold at the moment, so that doesn't mean much. Otters tolerate one another, forming group hierarchies based on the most desirable living areas. Isn’t that a great word? Eyesight. Plus otters each fish, which they are going to smell a bit like. A specialized lens and cornea correct for the refraction of light caused by the transition from aerial to aquatic vision. Their poop (called spraint) has a somewhat pleasant smell … To most people otter spraint has a pleasant musty smell whereas the smell of mink and fox faeces are unpleasant. All otters have very good hearing. The scent of an otter’s spraint determines the animal’s age, sex, and reproductive period. Each otter’s spraint has a slightly different smell, which enables them to communicate easily. Dave is correct in saying they have a very distict smell and it is not unpleasent at all. I have a collection of spraints and they are all different you really have to go by smell in some cases. Turkey Vultures find their food by smell, so either this otter had some nasty fish smell from a previous meal or some very ripe sprint nearby would be my guess. Otters have the densest fur of any animal—as many as a million hairs per square inch in places. Spraint composition is unique to each otter, and the creatures can identify each other by the smells. Runways are the most common characteristic of an otter home, connecting small or large bodies of water together. The smell of an otter’s spraint has been likened variously to that of freshly mown hay to putrefied fish. They can vary in size a great deal and do not always contain fish bones. Not only do otters spread fecal-facts but they also rub at the sites, leaving behind scent and smell as well. That is otter spraint. 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