Orange sulphur butterflies are very common throughout North America. They have pale orange and yellow wings that you have ...

In the study, the researchers looked at two species of North American butterflies: the orange sulphur (Colias eurytheme) and the clouded sulphur (Colias philodice). The wings of the male orange ...

“It’s kind of an overwhelming amount of loss and decline,” she says. An orange sulphur butterfly (Colias eurytheme) perches on a lantana plant. Lest you think the widespread declines are ...

The team used its new camera system to show how a UV-sensitive bird sees orange sulphur butterflies in nature. Image: Daniel Hanley Scientists say they’ve invented a piece of technology that ...

In the study, the researchers looked at two species of North American butterflies: the orange sulphur (Colias eurytheme) and the clouded sulphur (Colias philodice). The wings of the male orange ...

Some of the same species that graced us last month still continue, though in reduced numbers, like sleepy orange and dainty sulphur butterflies. Others that were occasional a few weeks ago have ...

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