Adults are shiny, one-half to three-quarters-inch long with two pairs of transparent wings. (Wikimedia Commons) Yellow jackets may be the most annoying summer and fall pest. While an honored part ...

The wheel bug ... wings are a real attention-getter. On closer inspection, the insect is a similar blue-black on its head, thorax and first two segments of its abdomen, but red with bright yellow ...

The blue jay ... mixes with yellow pigment, making the frog appear blue. Butterflies in the genus Morpho, commonly called blue morphos, are notable for their beautiful blue wings.