It’s OK to feed the birds again. The recommendation that the public put away their bird feeders and bird baths while officials investigated the mysterious illness that has killed a large number of songbirds has been lifted, according to the Pennsylvania Game Commission.

The game commission issued the recommendation on July 1 after songbirds in 27 Pennsylvania counties and parts of the United States were found dead from an unknown disease.

At the time, officials wanted to take away the places where birds congregate until they could do further studies to identify the disease and how it is s...