That fact that four fuzzy falcons are making their home on the Cofrin Library roof is a bigger deal than first appears. It wasn’t that long ago that a Wisconsin resident would have zero chance of seeing a Peregrine falcon in the wild. Although native to Wisconsin, they had vanished by the 1960s due to habitat loss and extremely low production of young. Pesticides such as DDT thinned the eggs of raptors, causing them to fail. Peregrine friend Greg Septon has worked for years to rebuild the population. And recently banded the four new chicks that are making their home on the Cofrin Library. The Journal Sentinel has an incredible success story, spearheaded by Septon.