Two Coats of Arms: City and Abbey

Here, on the exterior of Mondsee Abbey, we find two coats of arms side by side, the pair surmounted by a mitre:

On the left, we see the arms of Mondsee, Austria: Per fess: Azure a moon in her decriment or; and Argent three boats or each charged with three bendlets sable and rowed by a standing boatman proper habited gules hatted sable.

And on the right, the arms of the Benedictine Abbey of Mondsee: Per fess: in chief, Per pale or and sable, a two-headed eagle displayed sable issuant from the palar line, and a camel passant or; in base, Argent a circular lake surrounded by a ring of trees all proper. (A color depiction of these arms can be found on the website of Heraldry of the World, https://www.heraldry-wiki.com/wiki/Mondsee)

Mondsee Abbey (German: Kloster Mondsee) was a Benedictine monastery in Mondsee in Upper Austria. The region of the Mondseeland, in which Mondsee is located, was formerly part of Bavaria. Mondsee Abbey was founded in 748 by Odilo, Duke of Bavaria, on the ruins of a Roman settlement.

Do I know why the arms of Mondsee Abbey have a camel on them? No, I do not. It seems a most unusual charge for an establishment in Bavaria, later Austria. But then, I have found camels in the heraldry of a number of places where one would not expect them: for example, Ville de la Couronne, France; Le Poil, France; Plzn, Czech Republic; Timelkam, Austria; Tinajo, Spain; Tuineje, Spain; and the Zunft zum Kämbel ("Kämbel guild") of Zürich, Switzerland. This last is pretty clearly canting arms, but not the others.

I feel certain that there is a story in there somewhere about this coat of arms, but I have no idea what it might be.