For animals exploring new territory, taking risks is key to survival. But eating unfamiliar foods can be dicey, since they might contain new pathogens and parasites. One avian immune system, however, ...

What Does a House Sparrow Look Like? The male house sparrow has a gray and rusty crown with pale cheeks and a black bib. Reader Patrice Iacovoni of Waterford, Michigan, shared a photo of a female ...

I have a deep fondness for wild things. Wild flowers, wild fruit and wildlife – it matters little. I love them all – almost. What’s not to love, you ask? Unfortunately, it’s a few species that seem to ...

“Predictably Philandering Females Prompt Poor Paternal Provisioning”—that’s the name of a recent report on infidelity in house sparrows. The paper was published in The American Naturalist. Monogamy ...