I would like to build a tracking system to track a bird which is either solar or battery powered. It needs to be about 5g to 50g. And aswell 2.36 inch by 1.18 inch. This needs to transmit a signal from about 2 miles. I need it to transmit the signal as a flashing dot or something else to my notebook or my mobile.

If anyone knows how to do this please tell me it is urgent.

Thanks.

 

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Such devices exist commercially. Here is a link to the Wikipedia article - http://en.wikipedia.org/wiki/GPS_Wildlife_Tracking.