The biggest indicator for finding the bird’s dead body is none other than strong smell which it emits. Odor can be used for finding dead birds in places that are difficult to imagine such as ducts, air ways and ventilators.Click to see full answer. Consequently, how long does a dead bird smell last?Because these are larger animals, the smell can last several weeks, even up to two months, so I recommend that you hire someone like me to crawl under there and bag the animal.Also, will a dead bird in chimney smell? They leave a horrible stench and this is especially true if they have died in or under your home and it may be impossible to get rid of that smell if you let it permeate your house. Dead animals can also carry diseases that can be passed on to you or your pets if you should come into contact with it. Subsequently, question is, what does dead animal smell like? Scientifically, it’s a combination of sulfur dioxide, methane, benzene derivatives and long chain hydrocarbons produced as various body parts decompose. But to those familiar with the stench of dead bodies, it’s simply the smell of death. Like all smells, it is hard to describe.Can you get sick from dead animal smell?Yes, if pungent enough, it can make you vomit. No, you are unlikely to catch a disease by smelling a dead rat, unless you actually touch the rat. For a third complication, some rat-carried diseases are actually carried by fleas living on rats.