Ambient entities are objects that appear and move around in the background, and cannot be interacted with in any way. They are displayed depending on the time of day, biome, and weather. While some can be seen regularly, others are only displayed rarely. Clouds can be considered background entities although they are not affected by biomes. Ambient entities' motion speeds up with time.
List of ambient entities[]
| Entity | Image | Display condition |
|---|---|---|
| Meteor | 
|
Shortly prior to a meteor crash |
| Birds | 
|
Forest and Hallow during the day |
| Wyvern | 
|
Hardmode during the day |
| Airship | 
|
Windy Day |
| Air Balloon |          
|
Forest and Hallow during the day |
| Balloons |       
|
Party |
| Eye of Cthulhu | 
|
Night |
| Butterfly swarm |  
|
Forest and Hallow during the day, based on the spawn rate of butterflies that day. |
| Lost Kite | 
|
Windy Day |
| Vulture | 
|
Desert during the day |
| Bat |   
|
Jungle during the night in large swarms |
| Pixie posse |  
|
Hallow |
| Seagull | 
|
Ocean during the day |
| Slime Balloon |       
|
Windy Day in swarms |
| Gastropod | 
|
Hallow during the night in swarms |
| Winged Unicorn | 
|
Hallow during the day |
| Eater of Souls |   
|
Corruption |
| Crimera |   
|
Crimson |
| Hellbat |  
|
Underworld in large swarms |
| Bone Serpent | 
|
Underworld |
| Release Lanterns |   
|
Lantern Night |
| Falling Slimes |    
|
Slime Rain |
| Martian Saucer |  
|
Martian Madness |
List of clouds[]
Normal clouds[]
Regular 1
Regular 2
Regular 3
Regular 4
Cirrocumulus 2
Cirrocumulus 3
Cirrocumulus 4
Cirrocumulus 5
Cirrus 1
Cirrus 2
Cirrus 3
Cirrus 4
Cirrus 5
Cumulus 1
Cumulus 2
Cumulus 3
Cumulus 4
Cumulonimbus 2
Cumulonimbus 3
Cumulonimbus 4
Rare clouds[]
Every time a cloud is displayed, there is a 0.67*1/150 (0.67%) chance it will instead be one of these rare clouds.
Eye of Cthulhu's second form
Notes[]
- The Meteor ambient entity will only be displayed if the condition for the meteorite biome to spawn was fulfilled between dusk and 11:40 PM, which includes the random chance each night. It will always start falling in the background at 11:40 PM.[1]
- Even if circumstances would prevent meteorite landings (i.e., no new meteorite biome would actually be generated), the background meteor will still appear when the conditions are fulfilled.
Trivia[]
- The bats more accurately represent the bats from the Bat Scepter rather than the bat enemy.