Bald eagle nesting pairs in the US

As bald eagle nesting pairs have recovered across the United States—a genuine conservation success story—more cyclists have been killed on American roads, a correlation that forces us to confront the unsettling image of America's national bird soaring majestically above a dangerous intersection. The coefficient is 0.883 across nine data points, during which eagles thrived and cyclists did not, and the chart connecting them had the patriotic audacity to suggest a relationship. Freedom is complicated.

Bald eagle nesting pairs grew from about 9,800 in 2005 to over 71,000 by 2021, one of the great conservation recoveries in American history, driven by the DDT ban, the Endangered Species Act, and decades of habitat protection. Cycling fatalities grew from about 780 to over 960 during the overlapping period as more people commuted by bicycle in cities without adequate infrastructure. Both trends are measures of recovery and growth in different domains: the eagles recovered because the environment improved, and cycling grew because urban culture changed. They share a decade of positive trends (for eagles) and negative trends (for cyclists) that happen to move in the same direction.

Nine years of eagle recovery and cycling danger growing together is a correlation that reads like an editorial cartoon nobody commissioned. The national bird thrives while the national cyclist struggles, and the connection between them is nothing more than two trends sharing a timeline in a country large enough to contain both success and failure simultaneously. The eagle soars, the cyclist pedals, and the road remains unreformed.