Resources for advocates

Measuring Skyglow Over the Front Range

IDA Colorado members and others are working to find new approaches to measuring skyglow where our problem is greatest, the Front Range Urban Corridor, along a line from Pueblo, through Denver, and north to Fort Collins.  Airplane flights are being used to capture skyglow images from about 3000 feet above ground level.  The National Park …

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Bird Migration Update (April 2021)

Spring bird migration season is here!  In Colorado the peak of spring migration is in early May.  Studies show that huge numbers of birds fly on just a few nights.  Colorado State University’s bird migration forecast can predict migration activity levels one, two, or three days in advance.  Watch for alerts at, and see …

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