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 should I do to keep house sparrows from tormenting wrens and bluebirds? Should I take the birdhouses down?” asks Ruth Armstrong of Niles, Michigan. Many people love to attract nesting bluebirds.
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