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Monarch ER- 8" by 8" cage for nursing sick caterpillars and problem chrysalises
a small cage for birthing butterflies and nursing sick caterpillars.

Monarch ER Butterfly Cage- mini monarch hospital 8"x8"x8"

Regular price Sale price
$8.99   $7.99

Unit price per

MonarchEmergency Room for birthing butterflies and nursing sick caterpillars!

  • For Indoor Use or Outdoor Area protected from wind/rain/predators
  • Drawbridge Door-flap hangs down and won't get in your way when cage cleaningor inserting/removing monarch caterpillars, chrysalides or butterflies
  • 8" x 8" cube is our mini monarch hospital for fallen chrysalidesor sick caterpillars that need to be separated to prevent spreading disease
  • this cage size is too small to fit accessories and won't fit floral tubes, racks, or the poo poo platter.
  • Fine mesh keeps baby in and small predators out
  • Handles for easy portability
  • NOPVC Window allows butterflies emerging from chrysalides to easily climb up cage to dry their wings
  • GreenCage folds flat for easy storage.
  • Check out our Instructions Page for additional cage and accessories info
  • All Butterfly Cage/Kit customers receive an invite to our Closed Facebook Groupto discuss raising monarchs + post your photos
  • Save 15% when you bundle a cage with the How to Raise Monarchs Downloadable Guide (this guide also contains info on finding eggs or purchasing them from vendors, if needed)

Customer Reviews

Based on 68 reviews
Debbie Watanabe
I love it..

Im very happy with my purchase!
I just love it. Its supposed to be an ER hospital for caterpillars or butterflies. I use it to put my butterfly in before releasing it.I like how cute and small it is and you can fold it to flatten it. I thought the price was very reasonable. I want to buy another one!

Honey Olds


Good Idea

These cages are great to have on hand just in case.. I ordered 2 this season hoping not to need them. I used one for its intended purposes, isolating a chrysalis that showed signs of tachnid fly parasitization, and lent the other to a neighbor to isolate her odd looking chrysalids. The cages are easy to use and easy to disinfect after use. Ive also used one for for eggs on single leaf cuttings in floral tubes, using very small heavy jars as tube holders.

Liz V
Monarch ER cage

Perfect size for rearing the tini cats until they can be moved to the larger sized cages. Also perfect for separating the sick cats.

Small cages are great . . .

. . . great for small caterpillars or a single large one. I use these for the 2-3 instars, and they are easy to clean, don't take up a lot of space. Perfect!

Customer Reviews

Let customers speak for us

2305 reviews
Love the Tall Baby Caterpillar Cages

These are my favorite cages for raising my butterflies. The poo poo platter fits in this cage for easier cleaning and during my busy time mid-season I had seven of these cages is use at the same time!! I have learned so much through you and this community and have improved my raising skills and raising capacity over the last three years. I've also gotten others to begin
using these cages.

Great racks for the tubes

These short racks hold the floral tubes securely and are well made. I like the white racks for the floral picks, but I've had 2 cats make their chrysalis on the underside of the squares. I had to move them (very nerve-racking!) This doesn't happen with these shorter racks. Definitely beats using egg cartons to hold the tubes!!

Life with Monarchs

Have learned to love the cubes!! They help me to provide a more normal environment for my cats and butters地nd I appreciate all of the information provided by this web site. Thanks!

Perfect setup.

The mesh cage, the plastic tubes, and the short peg tube racks all worked perfectly to help me protect and successfully raise my Monarchs. Great products!

caterpillar cage

I love the clear mesh cages they are my favorite. You can see whatever you have inside.