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Willie Wagtail springing vertically from a fence rail
the willy wagtail is a small bird with a white breast and black body and a long tail
Prader Willi Syndrome. Doctor with rare or orphan disease text on tablet screen Prader Willi Syndrome
Chicago Willis tower from canopy
Gross anatomy of the base of a human brain. The blood vessels of circle of Willis (Willis polygon) have atheromatous plaques appearing as thickened yellow-whitish regions.
Catchweed bedstraw (Galium aparine) stem showing whorled leaves and round, prickly fruits. Mature fruits cling to skin, clothing, and fur with tiny hooks, thus dispersing the plant's seeds.

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