Free satellite imagery to help migrating birds survive from Alaska and Canada to Central and South America

Figure: Landsat-7 image (courtesy of USGS/NASA) showing wetlands in the northern Central Valley, California. There is a growing quantity of free imagery that can be extremely useful, for example in environmental projects. One such project, called BirdReturns, is using Landsat free satellite imagery to help migrating birds survive, supported by citizen science and conservation groups, […]