Skip to content 
My husband and I had been looking forward to our vacation for weeks.
After a long journey, all we wanted was to get to our hotel room, put our bags down, take a shower, and finally relax. The room seemed perfectly ordinary when we first walked in. Everything looked clean, the bed was neatly made, and nothing immediately seemed unusual.
Then I noticed something above the doorway.
At first, I thought it might be some strange decoration or perhaps a piece of damaged material hanging from the frame.
But when I looked more closely, I realized it definitely wasn’t part of the hotel.
It was a long, brown, textured structure attached to the upper part of the door frame. At the bottom was a rounded, almost pouch-like section containing what appeared to be a pale, smooth object.
I called my husband over.
Neither of us knew what we were looking at.
We stood there staring at it.
The longer we looked, the stranger it seemed.
It almost looked like something had been deliberately built there. The brown material appeared layered and rough, almost as though someone had carefully constructed it one small piece at a time.
And then came the question neither of us could answer:
What was inside it?
Was it an insect nest?
Was it an egg?
Was it some kind of cocoon?
Or had something living actually made this unusual structure inside our hotel room?
Naturally, our first instinct was not to touch it.
Instead, I took a photograph and started looking closely at the shape.
The strange object in the photograph is consistent with a mud nest made by a solitary wasp, such as a mud dauber or potter wasp, although the exact species cannot be confirmed from a photograph alone.
And the pale object inside is one of the most fascinating parts of the story.
These wasps are remarkable builders.
Unlike social wasps that create large colonies, many mud-dauber and potter-type wasps are solitary insects. A single female can construct a nest by collecting tiny amounts of wet soil or mud and carrying the material back to a suitable location.
That location might be under an eave, on a wall, inside a sheltered corner, beneath a roof overhang—or, as this photograph appears to show, somewhere around a protected doorway.
The wasp essentially becomes a tiny construction worker.
It gathers mud.
It transports the material.
It places it on the structure.
Then it shapes and reinforces the nest.
Over time, the individual pieces can create surprisingly elaborate structures.
And some species build tubular or elongated extensions that make their nests look completely unfamiliar to people who have never encountered them.
That’s why someone finding one inside a hotel room might reasonably have no idea what they’re looking at.
It doesn’t resemble the familiar papery nest people associate with wasps.
There is no obvious swarm.
There may be no visible insects around it.
Instead, there is simply a strange architectural structure attached to a building.
The pale object visible inside can be especially confusing.
Depending on the species and stage of development, a mud nest can contain a developing wasp larva or pupa, along with prey that the adult female has placed there as food.
Some solitary wasps provision their nests with spiders, caterpillars, or other small prey.
The female captures the prey, often immobilizes it, and places it inside a chamber.
She then lays an egg nearby.
When the egg hatches, the developing larva has a ready food supply.
It sounds frightening when described that way, but this is a normal part of the wasp’s life cycle.
And importantly, these insects are very different from the aggressive social wasps people sometimes encounter around food or garbage.
Many solitary wasps are generally reluctant to sting people unless they are handled or threatened.
That’s one reason discovering a nest doesn’t necessarily mean a hotel room has become dangerous.
Still, finding any insect nest indoors can be unsettling.
Especially when you don’t know what it is.
Imagine walking into a room expecting a relaxing vacation and discovering something that looks like a mysterious biological structure hanging above the doorway.
You might immediately wonder whether the room has an infestation.
But one unusual nest does not automatically mean there is an infestation.