Portland/Vancouver Squirrels. There are hundreds of species of squirrels in the world with each region hosting its own variety. Here in the United States, there are approximately a dozen common tree squirrels, two species of flying squirrels, and a host of ground squirrels and chipmunks. The squirrel species noted here are squirrels commonly found in the Portland Metro/Vancouver Washington area. The Eastern Gray Squirrel (sciurus carolinensis).
These assets can then be loaded using the Resources.Load function. Still the reason why we might want to use the Resources folder may be a little confusing. First you have to understand how Unity build process is works and how Unity is able to access game assets.
Step 5. Add the HZMediationImports.m file to Unity (Only required for iOS) This file imports the frameworks required by the 3rd-party SDKs you've chosen above. Download this file and add it to the Plugins/iOS/Heyzap/ directory in Unity 5, or the Plugins/iOS/ directory in Unity 4.