Here is the full list of all 31 Beasts of Maravilla Island achievements. It takes around 2-3 hours to unlock all of the achievements on Windows.
Capture all unique vegetation photos in the Singing Jungle
Take your first photograph
Capture all binkey behaviors
Capture all photos in the Singing Jungle
Capture all otterdile behaviors
Capture all photos in the Glimmering River
Capture all griffin behaviors
Capture all photos in the Painted Plateau
Capture all photos of the Island Spirit
Capture all photos
Beat the game for the first time
Lure all binkeys to their nests
Lure out all 3 singing binkeys
Play fetch 20 times
Capture all gem bug photos in the Singing Jungle
Capture all butterfly photos in the Singing Jungle
Capture all bird photos in the Singing Jungle
Capture all gem bug photos in the Glimmering River
Capture all bat photos in the Glimmering River
Capture all frog photos in the Glimmering River
Capture all unique vegetation photos in the Glimmering River
Capture all gem bug photos in the Painted Plateau
Capture all reptile photos in the Painted Plateau
Capture all raptor photos in the Painted Plateau
Capture all unique vegetation photos in the Painted Plateau
Take a selfie
Return what was lost
Discover the lost journal page
Make it to the Glimmering River
Make it to the Painted Plateau
Get all achievements for Beasts of Maravilla Island!