For the "Many Game Objects from One Prefab and an Array of Sprites" tutorial. http://masteringunity2d.com/unity-2d-tutorial/many-game-objects-from-one-prefab-and-an-array-of-sprites/

SpawnAnimal.cs

using UnityEngine;
using System.Collections;

public class SpawnAnimal : MonoBehaviour {

	public GameObject animalPrefab;
	public Sprite[] animalSprites;

	public void MakeRandomAnimal()
	{
		int arrayIdx = Random.Range (0, animalSprites.Length);
		Sprite animalSprite = animalSprites[arrayIdx];
		string animalName = animalSprite.name;

		GameObject newAnimal = Instantiate (animalPrefab);

		newAnimal.name = animalName;
		newAnimal.GetComponent<Animal>().animalName = animalName;
		newAnimal.GetComponent<SpriteRenderer>().sprite = animalSprite;
	}
}