Butterflies

Butterfly

Statistics

Type	Critter
Environment	Forest
AI Type	Butterfly AI
Damage	0
Max Life	5
Defense	0
KB Resist	0%

Sounds

Hurt
Killed

• Internal NPC ID: 356, 444 (Gold)

Hell Butterfly

Statistics

Type	Critter
Environment	The Underworld
AI Type	Butterfly AI
Damage	0
Max Life	5
Defense	0
KB Resist	0%

Sounds

Hurt
Killed

• Internal NPC ID: 653

Butterflies are small critters that can be found in Forests during daytime. They can be caught with a Bug Net (except for the Hell Butterfly) and carried in the inventory or crafted into Butterfly Jars. They can also be used as bait for fishing. The Underworld variant, Hell Butterfly, can be found in the Underworld during daytime.

Attempting to catch a Hell Butterfly with a standard Bug Net will not work, and the player will take 1 damage and be inflicted with On Fire! for 5 seconds / 10 seconds / 13 seconds.

Types

Butterfly		Rarity	Sell	Bait Power	NPC ID	Notes
	Gold Butterfly Internal Item ID: 2891	03*	10	50%	444	Low spawn rate.
	Julia Butterfly Internal Item ID: 2001	01*	30	25%	356
	Monarch Butterfly Internal Item ID: 1994	00*	5	5%	356
	Purple Emperor Butterfly Internal Item ID: 1995	02*	75	35%	356
	Red Admiral Butterfly Internal Item ID: 1996	02*	40	30%	356
	Sulphur Butterfly Internal Item ID: 1998	00*	10	10%	356
	Tree Nymph Butterfly Internal Item ID: 1999	03*	1	50%	356	Low spawn rate.
	Ulysses Butterfly Internal Item ID: 1997	01*	20	20%	356
	Zebra Swallowtail Butterfly Internal Item ID: 2000	01*	15	15%	356
	Hell Butterfly Internal Item ID: 4845	01*	20	15%	653	Can only be caught with Lavaproof Bug Net or Golden Bug Net. Can be used to fish in lava. Spawns in the Underworld during daytime.

Crafting

Used in

Result	Ingredients	Crafting station
Gold Butterfly Jar	Gold Butterfly Bottle	By Hand
Hell Butterfly Jar	Bottle Hell Butterfly
Julia Butterfly Jar	Julia Butterfly Bottle
Monarch Butterfly Jar	Monarch Butterfly Bottle
Purple Emperor Butterfly Jar	Purple Emperor Butterfly Bottle
Red Admiral Butterfly Jar	Red Admiral Butterfly Bottle
Sulphur Butterfly Jar	Sulphur Butterfly Bottle
Tree Nymph Butterfly Jar	Tree Nymph Butterfly Bottle
Ulysses Butterfly Jar	Ulysses Butterfly Bottle
Zebra Swallowtail Butterfly Jar	Zebra Swallowtail Butterfly Bottle
Golden Delight	Gold Butterfly	Cooking Pot or Cauldron
Butterfly Statue	Stone Block50 Any Butterfly5	Heavy Work Bench and Ecto Mist

Notes

• At every dusk (7:30 PM), or each time the world is loaded, the spawn rate of Butterflies and Stinkbugs are set to a random value. Below is the detailed info:
  • For Butterflies and Stinkbugs, there are two parameters: butterflyChance and stinkBugChance, the spawn rate of Butterflies and Stinkbugs, respectively.

These parameters are set in the following way:

•  Desktop version,  Console version, and  Mobile version:

• First, 33.33*1/3 (33.33%) chance: butterflyChance = 999999 (effectively preventing them to spawn), and stinkBugChance = 1–13, then there is a 20*1/5 (20%) chance for the stinkBugChance to be set to 999999.

• If the 33.33*1/3 (33.33%) chance failed, then: stinkBugChance = 999999, and butterflyChance = 1–20, then there is a 20*1/5 (20%) chance for the butterflyChance to be set to 999999.
• This effectively makes a day can only have Butterflies or Stinkbugs, not both of them.

• Then, if the world is a Celebrationmk10 world, butterflyChance is divided by 2. If the value is lower than 1 after dividing, then set it to 1.

•  Old-gen console version and Nintendo 3DS version:

• First, butterflyChance = 1–24.
• Then, there is a 33.33*1/3 (33.33%) chance for the butterflyChance to be set to 999999.

After these parameters are set, they will be used in spawning. Note that the following chances are only related to the respective critter and for reference only, they do not account for other spawns:

• Butterflies can only spawn during daytime when not raining, the player is on surface, is not in a Graveyard, and the wind speed is lower than 20 mph.

• There is a 1/butterflyChance chance for a Butterfly to spawn, then there are two individual 25*1/4 (25%) chances for an extra Butterfly to spawn.

• As a result, they can appear in groups of 1–3.

• For Hell Butterflies, they do not use the former spawning mechanic. They can always spawn in the Underworld during daytime, one at a time.

Tips

• New players should be on the lookout for days when lots of butterflies spawn, since they can fetch high prices. One day can easily net over 10.

Trivia

Bestiary entries

• Butterflies: "Beautiful fluttering insects that love sunrises. Fish are attracted to these based on their color variety."
• Hell Butterfly: "A solemn butterfly seeking blooms rooted in hell. Its wings glimmer with fiery veins."

See also

• Prismatic Lacewing, a boss-summoning critter whose behavior is similar to butterflies

History

 Desktop version

• Desktop 1.4.4: Increased the chances of having a Butterfly day (butterflyChance changed from 1–24 to 1–20).

• Desktop 1.4.0.1:
  • Hell Butterfly added.
  • Butterflies can now actively try to avoid enemies close to them.
  • Increased the chances of having a Butterfly day (chance of butterflyChance set to 999999 decreased from 33.33*1/3 (33.33%) to 25*1/4 (25%)).

• Desktop 1.3.0.1: Gold Butterfly added.

• Desktop 1.2.4: Can now be used as bait.

• Desktop 1.2.3: Introduced.

 Console version

• Console 1.06: Introduced.

 Mobile version

• Mobile 1.4.0.5.0:
  • Hell Butterfly added.

• Mobile 1.3.0.7: Gold Butterfly added.

• Mobile 1.2.11212: Introduced.