From Starbounder - Starbound Wiki
Bird Jar is an object unobtainable by players through normal means. This item's information is present in the game files, but not intended by developers to be in players' possession.
Bird Jar is a breakable object found in Avian Temples.
|Apex :||An Avian jar. Looks to be full of powder.|
|Avian :||An ash jar. Many Avians are cremated, their remains stored in jars such as these.|
|Floran :||Sssmash birdman jar.|
|Glitch :||Reflective. The ash in this jar is Avian in origin. The Glitch can not be disposed of this way.|
|Human :||Is this... an Avian's ashes?|
|Hylotl :||The Avians honour the ashes of the dead.|
|Novakid :||I'll bet this jar would break if I shot it.|