How can I drop an object from my player object with getmousebuttondown??

I am trying to make a mini game within my main game where you fly around as a bird and drop poop lol.
I have already programmed a decent flying script, and have a prefab for the poop. I cannot figure out how to make the prefab drop from the character with getmousebuttondown. Can anyone help me with a script??

In your bird script:

	public GameObject pooPrefab;
	void Update () {
		if (Input.GetMouseButtonDown(0))
			Instantiate(pooPrefab, this.transform.position, Quaternion.identity);

In your poo script:

public float fallSpeed = 1f;
void Update() {
	transform.position = new Vector3(transform.position.x, 
	                                 transform.position.y - (fallSpeed * Time.deltaTime),