"Unknown Parrot" in Sabah
Hi fsp,
I think the parrot in your photos is Blue-naped Parrot (Tanygnathus lucionensis). The MacKinnon and Phillipps Field guide (Birds of Borneo Sumatra, Java and Bali) says: "A feral population is found around Kota Kinabalu". According to Smythies's "The birds of Borneo" they have been there since 1962 !