XNA 4.0 For Loop Running Once

Question

i've been scanning the web and trying different methods for hours, I tried to put off asking here but I can't see any way around it unfortunately.

My problem is i'm creating a list of objects, birds specifically. And in my Initialisation method I have a for loop that runs through 10 times creating a new bird object, however when I run the game, it only creates one. I've looked through my code over and over and I can't seem to find the issue, something tells me when I fix it i'll kick myself for it :).

Thanks In Advance, Joe

Code:

Game1.cs

using System;
using System.Collections.Generic;
using System.Linq;
using Microsoft.Xna.Framework;
using Microsoft.Xna.Framework.Audio;
using Microsoft.Xna.Framework.Content;
using Microsoft.Xna.Framework.GamerServices;
using Microsoft.Xna.Framework.Graphics;
using Microsoft.Xna.Framework.Input;
using Microsoft.Xna.Framework.Media;

namespace PlummetGame
{
    public class Game1 : Microsoft.Xna.Framework.Game
    {
        GraphicsDeviceManager graphics;
        SpriteBatch spriteBatch;

        Texture2D backgroundTexture;

        // Game Objects
        Plane gamePlane;
        Truck gameTruck;
        Player playerOne;

        int maxBirds = 10;
        List<Bird> birdList = new List<Bird>();

        public bool playerIsActive;

        public Game1()
        {
            graphics = new GraphicsDeviceManager(this);
            Content.RootDirectory = "Content";

            // Screen resolution of 1280x720
            graphics.PreferredBackBufferHeight = 720;
            graphics.PreferredBackBufferWidth = 1280;
        }

        protected override void Initialize()
        {
            // Game Object Init
            gamePlane = new Plane();
            gameTruck = new Truck();
            Plane.gfxViewport = GraphicsDevice.Viewport;

            for (int i = 0; i < maxBirds; i++)
            {
                birdList.Add(new Bird());
            }

            playerIsActive = false;

            base.Initialize();
        }

        protected override void LoadContent()
        {
            spriteBatch = new SpriteBatch(GraphicsDevice);

            // Game Object Sprite Loading
            Truck.Texture = Content.Load<Texture2D>("truck");
            Plane.Texture = Content.Load<Texture2D>("plane");
            Player.Texture = Content.Load<Texture2D>("parachutes");
            Bird.Texture = Content.Load<Texture2D>("BirdFlying");
            Truck.myFont = Content.Load<SpriteFont>("myFont");

            backgroundTexture = Content.Load<Texture2D>("background");

        }

        protected override void UnloadContent()
        {
            // TODO: Unload any non ContentManager content here
        }

        protected override void Update(GameTime gameTime)
        {
            gamePlane.Update();
            gameTruck.Update();

            if(Keyboard.GetState().IsKeyDown(Keys.Back) || Keyboard.GetState().IsKeyDown(Keys.Escape))
            {this.Exit();}

            if (Keyboard.GetState().IsKeyDown(Keys.Space))
            {
                playerOne = new Player(new Vector2(gamePlane.Position.X, gamePlane.Position.Y + 25));
                playerIsActive = true;
            }

            if (playerIsActive == true)
            {
                playerOne.Update();
            }

            foreach (Bird ID in birdList)
            {
                ID.Update(gameTime);
            }

            base.Update(gameTime);
        }

        protected override void Draw(GameTime gameTime)
        {

            spriteBatch.Begin();
            // Must come first, background.
            DrawScenery();

            gamePlane.Draw(spriteBatch);
            gameTruck.Draw(spriteBatch);
            if (playerIsActive)
            {
                playerOne.Draw(spriteBatch);
            }

            foreach (Bird ID in birdList)
            {
                ID.Draw(spriteBatch);
            }

            spriteBatch.End();

            base.Draw(gameTime);
        }

        private void DrawScenery()
        {
            Rectangle screenRectangle = new Rectangle(0, 0, graphics.PreferredBackBufferWidth, graphics.PreferredBackBufferHeight);
            spriteBatch.Draw(backgroundTexture, screenRectangle, Color.White);
        }
    }
}

Bird.cs

using System;
using System.Collections.Generic;
using System.Linq;
using Microsoft.Xna.Framework;
using Microsoft.Xna.Framework.Audio;
using Microsoft.Xna.Framework.Content;
using Microsoft.Xna.Framework.GamerServices;
using Microsoft.Xna.Framework.Graphics;
using Microsoft.Xna.Framework.Input;
using Microsoft.Xna.Framework.Media;

namespace PlummetGame
{
    public class Bird
    {
        public enum Directions { Left, Right };

        // Static Fields
        public static Texture2D Texture;

        public static Directions Direction;

        public static Viewport gfxViewport;

        public int currentFrame = 0;
        private const int Frames = 9;
        private const int FramesPerSec = 2;

        // Fields 
        public Vector2 Position;

        // Declaring & Initialising a random object.
        Random r = new Random();

        SpriteEffects flip = SpriteEffects.FlipHorizontally;

        //Constructor
        public Bird()
        {
            int tempval;
            // Set the initial position of the bird.
            Position = new Vector2(r.Next(10, 1270), r.Next(10, 710));

            // Decides inital direction.
            tempval = r.Next(1, 2);
            if (tempval == 1)
            { Direction = Directions.Left; }
            else
            { Direction = Directions.Right; }

        }

        public void Update(GameTime gameTime)
        {
            float elapsed = (float)gameTime.ElapsedGameTime.TotalSeconds;

            // Boundary Checking * No need to check for Y as bird only moves laterally
            if (Position.X < 0)
            { Direction = Directions.Right; }

            if (Position.X > gfxViewport.Width - Texture.Width)
            { Direction = Directions.Left; }

            // Movement Handling
            if (Direction == Directions.Left)
            {
                flip = SpriteEffects.FlipHorizontally;
                Position.X--;
            }

            if (Direction == Directions.Right)
            {
                Position.X++;
                flip = SpriteEffects.None;
            }

            // Frame Animation
            currentFrame = (int)elapsed;

            if (currentFrame > Frames) { elapsed = 0; }
        }

        public void Draw(SpriteBatch spriteBatch)
        {
            spriteBatch.Draw(Texture, new Rectangle((int)Position.X, (int)Position.Y, 35, 41), new Rectangle(39, 0, 38, 65), Color.White);
        }
    }
}