The Amphibious Alliance is a minor government comprised of intelligent frogs.  They are low in status due to the fact that frogs are not one of the 'original' Ark species. Frogs gained intelligence after the Pig Government tried to recreate The Ark Project in order to gain new allies.

Factions of the Halfkind Series
Major: United Species Alliance - Brotherhood of Wolves - Gorilla Government - High Dog Council - High Human Council

Mentioned/Minor: Amphibious Alliance - Aviation Society - Cheetah Congregation - Chimp Nation - Crocodile Congress - Horned Beast Faction - Lion Authority - Pig Government - Republic of Cats - Royal Elephant Society - Tiger Legion

Teams: Company Manticore - Operation Halfkinds Task Force - The Alphas

Groups: HORUS - Implantus - USASD

Families: Lawton Family - Snow Family - Van Faye Family