Presumably Seattle crows are of average crow intelligence, but they happen to live where these interesting studies are happening. Or maybe Seattle's tech industry attracts the smartest of crows.
Seattle crows are so smart, they’re challenging what we know about evolution
Researchers have made startling discoveries in recent years about a crow’s ability to communicate, solve problems, remember people, and use tools. What they’re discovering about crow brains is changing how scientists understand intelligence — and bringing into question our accepted version of evolution.
kuow.org