Try the Commands Troubleshooting and Help page if you get stuff with server errors.
Minecraft summon parrot command
Using the summon command to spawn in a minecraft parrot is simple, take the command and enter into chat and presto you have a parrot. Parrots have a Variant tag for the 5 different colors.
How to summon a Red Parrot
To spawn in a red parrot use the Variant Nbt tag. Set Variant:0 and you will get a red parrot.
/summon minecraft:parrot ~ ~ ~ {Variant:0}How to summon a Blue Parrot
To spawn in a blue parrot use the Variant Nbt tag. Set Variant:1 and you will get a blue parrot.
/summon minecraft:parrot ~ ~ ~ {Variant:1}How to summon a Green Parrot
To spawn in a green parrot use the Variant Nbt tag. Set Variant:2 and you will get a green parrot.
/summon minecraft:parrot ~ ~ ~ {Variant:2}How to summon a Cyan Parrot
To spawn in a cyan parrot use the Variant Nbt tag. Set Variant:3 and you will get a cyan parrot.
/summon minecraft:parrot ~ ~ ~ {Variant:3}How to summon a Gray Parrot
To spawn in a gray parrot use the Variant Nbt tag. Set Variant:4 and you will get a gray parrot.
/summon minecraft:parrot ~ ~ ~ {Variant:4}Summon parrot owned by player, Owner NBT Data Tag (1.16+)
You can set which player owns the parrot by setting the UUID, which is now a int-array.
/summon minecraft:parrot ~ ~ ~ [I;-132296786,2112623056,-1486552928,-920753162]Summon parrot owned by player, OwnerUUID NBT Data Tag (before 1.16)
You can set which player owns the parrot by setting the UUID.
/summon minecraft:parrot ~ ~ ~ {OwnerUUID:00000000-0000-0000-0000-000000000000}Suggestions or found a bug
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If you're looking for a particular summon mob generator you can link to these specific versions of the command generator.
Detailed Mob Generators
Generators with pattern selectors
Other Mobs NBT Tag Data
Summon mob page with notes about custom mob options.