Monarch butterfly

The Monarch Butterfly (also known as monarch) is a brown-orange butterfly that can be found in September, October, and November. It is very common. Like most bugs, the creature sells for a considerably lower amount than all fish - in this case, lower than all of them. It is the only butterfly to appear during the autumn and one of four bugs (itself, the cricket, the Bell Cricket, and the migratory locust) to be limited to autumn.

Donating to the Museum
As with all fish and insects in the series, the monarch can be donated to the museum by talking to Blathers, who will give some information upon donation.

In Wild World
"The monarch butterfly got its regal name because of its orange coloring, wot? Yes, it reminded people of the king of England, aka William of Orange. To be perfectly honest, if I were His Highness, I'd be rather miffed! Blech! Truly, to have a filthy bug remind people of you... Absolutely appalling, wot!"

In City Folk
Blathers will say this upon donating the monarch butterfly:

"Monarch butterflies are quite colorful, aren't they? ...As it happens, the colors indicate they're poisonous! I certainly start to feel queasy when I look at one. Though that happens with all bugs... "

After donation, it can be seen flying around on the upper tier of the insect exhibit.

Bug Encyclopedia Information
In Wild World and City Folk, players can access information about fish and insects in the menu. Regarding the monarch butterfly:

Further Information
The monarch has a wingspan of about 9½ centimeters. It is found in North America, New Zealand, and Australia. The male has brighter colors than the female. They produce a toxin that is present in their wings, and touching them would poison you. The Viceroy Butterfly mimics the appearance of the Monarch butterfly, but they don't have venom.