Hose clamps are a fairly common item on these 900's need tightening, as others have pointed out.
In my experience though, one should use a flashlight like Bandit said and check all over. Wind (which gets swirled around and might not be going the way you think) vibrations, etc., sling that stuff everywhere. Check things like the area around the filler cap for evidence of coolant seepage, all hose clamps, etc.
I will chime in on the hose clamps also. Most of mine were leaking. Tried to tighten, but still had a small leaks. Finally, I just replaced them with some from the auto parts house. Haven't leaked since in 5 years.
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