Articles on Animals

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European stonechat (Saxicola rubicola) eating a butterfly with black-and-orange warning colours. Stanislav Harvancik

Warn, hide or stand out? How colour in the animal world is a battle for survival

A global experiment has helped explain why some animals use stealthy patterns to hide from predators, while others use warning colours to avoid being eaten.
The difficult-to-detect meningeal worm is spread by white-tailed deer and is a notorious killer of moose. AP Photo/Jim Cole, File

Parasitic worms bury themselves in the brains of moose and elk – a new test can help diagnose these animals to prevent disease spread

White-tailed deer host these brain worms, but they don’t actually get the disease, which makes it harder for biologists to monitor its prevalence.
Moose may have been in Colorado longer than previously thought. Illustration courtesy of Ettore Mazza

Moose have lived in Colorado for centuries – unpacking the evidence from history, archaeology and oral traditions

During much of the last century, moose were apparently rare in Colorado. But lately, encounters with humans are becoming more common as the population increases.

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