Sure, just take the cover off and then there are a few nuts that hold the air filter to the air filter backing plate. Since the crankcase breathes into the air filter, EPA requirement, it's a good idea to remove the air filter cover occasionally and clean the oil residue out. This is probably why the droppings look a bit oily. You may wish to consider installing a K&N air filter. They are made of a type of cloth and they are washable.
Good Luck
Steve
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