Counting Flying foxes using video

This is the link to a flyout video I recorded during a large influx of Little Red Flying foxes in the Hervey Bay area in February 2010. I have videos of a number of flyouts for using to estimate numbers. How many do you estimate? The video can be found at  : http://youtu.be/3RX3TX5_sTs. The original is 342 Mb . I think it has lost some detail during upload. I can provide originals for anyone with a counting programme!