Did People Ever Really Put Crocodiles In Moats?

John A. asks: Are there any real examples of medieval castles having alligators in the moat to keep out intruders?


A common image in pop-culture is that of a castle moat filled to the brim with water and hungry crocodiles. So did anyone ever actually do this?

The short answer is that it doesn’t appear so. That said, while there’s no known documented instance of crocodiles intentionally being put into moats, we do know of at least one castle that had (and has, in fact) a moat full of bears…

Before we get to that and why crocodiles in moats are probably not the best idea in the world, or at least not a very efficient use of resources if your concern was really defence of a fortress, we should address the fact that the common image most people have in their heads of a moat isn’t exactly representative of what historical moats usually looked like.

To begin with, moats have been around seemingly as long as humans have had need of protecting a structure or area, with documented instances of them appearing everywhere from Ancient Egypt to slightly more modern times around certain Native American settlements. And, of course, there are countless examples of moats being used throughout European history. In many cases, however, these moats were little more than empty pits dug around a particular piece of land or property- water filled moats were something of a rarity.

You see, unless a natural source of water was around, maintaining an artificial moat filled with water required a lot of resources to avoid the whole thing just turning into a stinking cesspool of algae and biting bugs, as is wont to happen in standing water. As with artificial ponds constructed on certain wealthy individuals’ estates, these would have to be regularly drained and cleaned, then filled back up to keep things from becoming putrid.

Of course, if one had a natural flowing water source nearby, some of these problems could be avoided. But, in the end, it turns out a water filled moat isn’t actually that much more effective than an empty one at accomplishing the goal of protecting a fortress.

And as for putting crocodiles (or alligators) in them, introducing such animals to a region, beyond being quite expensive if not their native habitat, is also potentially dangerous if the animals got out. Again, all this while not really making the act of conquering a fortress that much more difficult- so little payoff for the extra cost of maintaining crocodiles.

Unsurprisingly from this, outside of a legend we’ll get to shortly, there doesn’t appear to be any known documented cases of anyone intentionally putting crocodiles or alligators into their water filled moats.

It should also be mentioned here that while at first glance it would appear that the key purpose of a moat is to defend against soldiers attacking at the walls, they were often actually constructed with the idea of stopping soldiers under the ground. You see, a technique favoured since ancient times for breaching cities, fortresses and fortified positions was to simply dig tunnels below any walls surrounding the position and then intentionally let them collapse, bringing part of the wall above that section tumbling down. Eventually this was accomplished by use of explosives like gunpowder, but before this a more simple method was to cart a bunch of tinder into the tunnel at the appropriate point and set the whole thing ablaze. The idea here was, after all your diggers were out, to destroy the support beams used to keep the tunnel from collapsing while digging. If all went as planned, both the tunnel and the wall above it would then collapse.

To get around this very effective form of breaching fortifications, moats would be dug as deeply as possible around the fortification, sometimes until diggers reached bedrock. If a natural source of water was around, surrounding the fortress with water was a potential additional benefit over the dry pit at stopping such tunneling.

Either way, beyond making tunneling more difficult (or practically impossible), dry and wet moats, of course, helped dissuade above ground attacks as well thanks to moats being quite good at limiting an enemy’s use of siege weaponry. In particular, devices such as battering rams are rendered…

Sasha Harriet

Sasha Harriet

As content editor, I get to do what I love everyday. Tweet, share and promote the best content our tools find on a daily basis.

I have a crazy passion for #music, #celebrity #news & #fashion! I'm always out and about on Twitter.
Sasha Harriet

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