Tiny geolocators measure light levels and atmospheric pressure to reveal the migrations of small songbirds – including the yellow-rumped warbler, also known as a butter-butt – in unprecedented detail.
Birds are not only beautiful to look at and listen to; they also play important roles in nature. They eat pests and disperse ...
Pictured: Richard's pipits (Anthus richardi) are migrating on an east to west axis instead of heading south towards warmer latitudes. JJ Harrison via Wikimedia Commons under CC BY 3.0 Each year birds ...
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