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Gram stain showing blue cells gram positive in single,in pair,in cluster intracellular on red white blood cells background.Pus sp Royalty Free Stock Photo

Rustic summer picnic with fresh bread, cheese, seasonal fruit, and wine in a scenic countryside setting Royalty Free Stock Photo

The Canvasback (Aythya valisineria), historically known in the United States as a Sheldrake, is a large diving duck, up to 48-60 cm long and weighing 1270g.Their breeding habitat is North American prairie wetlands. The bulky nest is built from vegetation in a marsh and lined with down. Loss of nesting habitat has caused populations to decline. Canvasbacks usually take new mates each year, pairin