[Guide] These green little critters will help you gain more RS gold
Let’s catch some Swamp toads as many as we can and sell them for more RS gold.

Source: zybez
A guide on how to collect swamp toads and earn more RS gold
Swamp Toads lives in the swamp near the Tree Gnome Stronghold. While the swamp toad itself is used as an ingredient for making barker toad pouches, the toad’s legs (when removed) are used in Herblore to make Agility potions. The toad’s legs can also be eaten to regain two hundred health points. When you removed the legs, it will appear in your inventory instead of swamp toads. That’s why the swamp toads are in demand and can be a good source to make RS gold.
To start collecting the Swamp toads, first is head to the swamp north of the Tree Gnome Stronghold which is near right to the west of the Spirit Tree. In order to get there easier, you can use the Spirit Tree to teleport. Once you’re in the swamp, you can now start collecting swamp toads as much as possible or until your inventory is full. Once done, you can now head back to the city and to the Grand Exchange to sell the entire swamp toads to earn more RS gold.