Boardgamegeek https://boardgamegeek.com/boardgameexpansion/264396/bunny-kingdom-sky
English - Bunny Kingdom in the Sky adds a new game board to the world of Bunny Kingdom that allows you to link fiefs in the sky with those on land. Aside from the game board, this expansion includes new cards, new types of resources, a set of playing pieces that allow five bunnies to play in the same game, and a larger type of building that increases your influence in that area by a factor of five.
Ludovox http://ludovox.fr/jeu-de-societe/bunny-kindgom-in-the-sky/
French - Bunny Kingdom in the Sky ajoute un nouveau plateau de jeu au monde de Bunny Kingdom qui vous permet de relier les fiefs dans le ciel avec ceux à terre.