Researchers found that songbirds including the Northern Cardinal (pictured here) that live year-round in the urban core of San Antonio, Texas, had eyes about 5% smaller than members of the same species from the less bright outskirts.
Offered by Washington State University for PHYS.ORG 
Image credit: Jennifer Phillips, Washington State University.

Researchers found that songbirds including the Northern Cardinal (pictured here) that live year-round in the urban core of San Antonio, Texas, had eyes about 5% smaller than members of the same species from the less bright outskirts. Offered by Washington State University for PHYS.ORG Image credit: Jennifer Phillips, Washington State University.

Researchers found that songbirds including the Northern Cardinal (pictured here) that live year-round in the urban core of San Antonio, Texas, had eyes about 5% smaller than members of the same species from the less bright outskirts.
Offered by Washington State University for PHYS.ORG&nbsp;
Image credit: Jennifer Phillips, Washington State University.

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DSL | By PHYS.ORG - Urban Light Pollution Linked To Smaller Eyes In Birds: Study

DSL | By PHYS.ORG - Urban Light Pollution Linked To Smaller Eyes In Birds: Study