Monk parakeets were introduced to Europe by the pet trade. Credit: Debbie from Pixabay In the 50 years since monk parakeets arrived in Europe and spread across the continent, the species has developed ...

It’s a crisp fall evening in Grand Teton National Park. A mournful, groaning call cuts through the dusky blue light: a male elk, bugling. The sound ricochets across the grassy meadow. A minute later, ...