Beasts of Maravilla Island

The Singing Jungle is the first area of the game. This achievement should only take you 30 minutes to and hour, tops.

To get this achievement, you need to collect all the photos of the vegetation, birds, gem bugs, butterflies, and binkey behaviors in the Singing Jungle. Doing so will also net you 5 other achievements:
Green Thumb: Capture all unique vegetation photos in the Singing Jungle
Fruit Basket: Capture all bird photos in the Singing Jungle
Not Your Average Jewel Beetle: Capture all gem bug photos in the Singing Jungle
Fluttered By: Capture all butterfly photos in the Singing Jungle
All Monkey Business: Capture all binkey behaviors

Make use of your camera. If you're in camera mode and you've already captured something of interest in your journal, it will show the name of the plant or critter. If you haven't captured it yet, it will say "New!" when you hover over it in camera mode. The game is pretty straightforward, so you should be able to find all the plants and critters without a guide giving you specific locations. Even if you miss the first instance of a creature, it will also be present later along your journey.