A standard wasp or hornet’s nest, possibly attached to the attic beams

A minor inconvenience requiring pest control or a DIY removal

Maybe a few stings if disturbed — nothing more

What He Actually Found:
Inside the large, paper-like structure was not a nest at all, but something far stranger:

A carefully constructed cocoon of chewed insulation and fabric

Dozens of shredded pieces of old family photos and paperwork — used as nest material

And at the center, a sleeping opossum, surrounded by baby possums, curled up in the warmth

Ingredients (If this were a DIY wildlife-safe relocation plan)
Protective gloves

Pet carrier or ventilated box

Soft cloth or towel

Flashlight or headlamp

Local wildlife rescue contact information

Preparation
Avoid sudden movements — the mother opossum may startle easily.

Contact a local wildlife rehabilitator or animal control — many will assist for free or a small fee.

If safe to do so and permitted in your region:

Gently place a towel inside a carrier and coax the animals inside.

Keep the carrier warm and dark during transport.

Clean the attic thoroughly with protective gear once animals are removed.

Serving and Storage Tips (Not literal here — interpreted as advice for prevention)
Seal all entry points in your attic and roofline with mesh or foam.

Avoid leaving food in garbage bins or pet dishes outdoors.

Use motion-sensor lights to discourage nighttime wildlife.

Store sentimental items like photos and documents in sealed, rodent-proof containers.

Inspect attic insulation regularly for signs of nesting or damage.

Variants (Other things that are often mistaken for hornet’s nests)
Bee colonies (which may produce honey and wax)

Squirrel nests made of leaves and twigs

Bat roosts — often found hanging from rafters

Mummified rodent remains in old insulation

Abandoned wasp nests later taken over by birds or rodents

FAQ
Q: How can you tell the difference between a hornet’s nest and something else?
A: Hornet nests are typically smooth, paper-like, and suspended. If it’s on the floor, messy, or filled with fabric or fur, it’s likely a mammal nest, not an insect one.

Q: Is it dangerous to approach a wild animal nest?
A: It can be — always wear protective gear and contact a wildlife expert before attempting removal.

Q: Why do animals choose attics for nesting?
A: Attics are quiet, warm, and undisturbed — ideal conditions for wildlife seeking safety for offspring.

Q: What should I do if I see animal activity in my attic?
A: Call a licensed wildlife control professional. Many animals are protected and must be removed safely and legally.

Q: Can hornets build nests indoors?
A: Yes — though it’s less common, hornets and wasps can build nests in attics, walls, and crawlspaces if there’s access.