I looked through the snaps of heli-kitties and made this list of locations where they were (sorted by region name):
Alakol-Dyran Notion
Andra-Chego Chase
Aranna-Aratikaya Kaya
Balzare-Indulcet Fames
Baqala-Mart's Way 1
Besara-Saker Mank
Bortola-Borem Summon
Brillah-Tandem Flush
Callopee-PokiPok Press
Cauda-Suruta Serendipity
Chakra Phool-Amerran Huddles
Choru-Hayseed Rd 3
Drifa-Sliding Skimmers
Fenneq-Deodak Nabak
Firozi-Prashura Sure
Folivoria-Pitonia Lood
Groddle Forest-Pasha's Place
Groddle Forest-Strucote Stacks
Groddle Heights-Beesfast Heave
Groddle Heights-Bishop's Arch
Groddle Meadow-Buckward Vale
Groddle Meadow-Marylpole Mount
Ilmenskie Caverns-Level 3 East [These seem to have gone missing]
Jethimadh-Tuntsa Coze
Kajuu-Tonga Trips
Kalavana-Gopra Byle
Karnata-Balin Bastion
Lida-Twaye Monte
Massadoe-Kategna Kibe
Muufo-Desmona Dr
Muufo-Sobane Banes
Nottis-Stafli Joli
Ormonos-Meion Nsut
Rasana-Kartika Crams
Salatu-Lunu Lane
Shimla Mirch-Humus Hollow
Sura-Ramyeon Kon
Tahli-Kaavi Kannot
Tamila-Prutki Pardons
Vantalu-Nalla Duva
Large Alakol Model Home
Little Poundcake's Home Street
Has anyone found any kitties in locations that aren't listed here?
(Edited to add some that were posted)