Misotten L . Estimation of the ratio of cones to neurons in the fovea of the human retina. Invest Ophthalmol Vis Sci 1974;13:1045–9. Adams CK, Perez JM, Hawthorne MN . Rod and cone densities in ...

As spring begins, so does a fresh song at daybreak, unique to the season. Just before the sun rises, birds start singing their melodies, creating a chirpy symphony. “It's the epitome of spring ...

In one of the more unusual tributes to birds, two 40-something men from northwestern France now travel the world, convincingly imitating bird songs onstage with symphony orchestras or concert pianists ...

SAN FRANCISCO – In the classic film “The Birds,’’ flocks of crows and other species suddenly and viciously attack people for no apparent reason. Now another Bay Area-based mystery has ...