In this thoroughly explained, detailed flash lesson, I will show you how to create realistic, frame by frame bird fly animation using some special flash tips and tricks. You don't have to use action script code to make this lesson. Using this lesson, you will see how to draw, frame by frame bird wings moving, how to convert bird into a movie clip symbol, how to animate it and much much more. You can use this lesson for any flash header, banner or for some other flash components. Let's start!
Example:
Step 1First, save the image below that we will use for this lesson as background.

Step 2Create a new flash document. Press Ctrl+J key on the keyboard (Document Properties) and set the width of your document to 450 pixels and the height to 239 pixels. Select any color as background color. Set your Flash movie's frame rate to 34 and click ok.
Step 3Call the current layer background. Double-click on its default name (Layer 1) to change it. Press Enter once you have typed in the new name!
Step 4Choose File > Import > Import to stage (Ctrl+R) and import the image that you just saved in step 1 into a flash stage. While the image is still selected, go to the Align Panel (Ctrl+K) and do the following:
1. Make sure that the Align/Distribute to Stage button is turned on,
2. Click on the Align horizontal center button and
3. Click the Align vertical center button.
Step 5
Click now on frame 100 and hit F5 key.
Step 6
Create a new layer above the layer background and name it bird. It's time for drawing, so, using the Line Tool and Paing Bucket Tool, draw a bird body without wings like it is shown on the picture below!

While the bird body is still selected, hit F8 key (Convert to Symbol, to convert it into a Movie Clip Symbol.
Step 7Double-click on the movie clip on stage with the Selection tool(V).You should now be inside the Movie Clip.
Step 8Call the current layer bird body. Double-click on its default name (Layer 1) to change it. Press Enter once you have typed in the new name!
Step 9Click now on frame 30 and hit F5 key.
Step 10It's time for wing animation, so create a new layer above the layer bird body and name it wing 1.