Some female hummingbirds don flashy feathers to avoid being bothered by other hummingbirds, a new study suggests. Beyond vying for mates, animals often also compete for territory, parental attention, ...
When you think of a hummingbird you probably think of a small sweet bird. But, hummingbirds are also very aggressive, especially males. According to a new study, some female hummingbirds are evolving ...
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