White spruce, North American tree.

Nicotiana glauca: toxic, tree-like shrub.

Blue shark, widespread pelagic species.

Nonexistent species, confusion with Leucaena.

a species of flowering plant in the willow family known by the common names gray willow, grayleaf willow, white willow, and glaucous willow.

Grass species, often considered weed.

Festuca glauca, commonly known as blue fescue, is a species of flowering plant in the grass family, Poaceae.

Notonecta glauca, also known as the greater water-boatman or common backswimmer, is a species of aquatic insect in the family Notonectidae.

Perennial plant with spiky leaves.

a species of manzanita known by the common name bigberry manzanita.