With reports of sick and dying birds in the mid-Atlantic region of the United States, Colorado Parks and Wildlife said it is on the lookout for any signs of similar concerns in Colorado.

Officials said that, so far, no cases compatible with this “mystery disease” have been confirmed in the state of Colorado. The syndrome observed in other states is characterized by swollen eyes, blindness and signs of neurologic impairment.

The birds most commonly affected have been young blue jays, grackles, European starlings and American robins. The cause of this disease remains unknown.

The public is asked to contact the nearest Colorado Parks and Wildlife office if you observe birds with swollen eyes, birds that appear sick or act abnormal, or if you observe three or more dead birds in one location within a two week period.

Officials added that in Colorado, house finches can be infected by bacteria that cause swollen, crusty eyes, but this finch conjunctivitis disease has not been seen in other species. Finch conjunctivitis and other bird diseases are often spread at bird feeders.

Remember to clean bird feeders and bird baths regularly by removing all debris, cleaning with a 10 percent bleach solution, rinsing with water and allowing them to air dry completely before refilling. Owners should take down feeders if they notice sick or dying birds.

CPW does not recommend bird feeders be used at all from mid-March through Thanksgiving in bear country.