Cirrus clouds in the blue sky in early spring. Separate, thin, filamentous clouds in the form of white thin fibers, slightly grayish elongated ridges and shreds.Cirrus clouds in the blue sky in early spring. Separate, thin, filamentous clouds in the form of white thin fibers, slightly grayish elongated ridges and shreds. Having the appearance of a white feather beard. Arranged in stripes, crossing the firmament like meridians. At dawn and sunset, cirrus clouds acquire pink and golden shades.