Robin ~ Turdus migratorius Throughout the central and northern states, the return of the Robin in March is a regular topic of conversation. It means that spring is in the air, heralded by a reliable friend. Within a few days after the males appear in northern yards the females arrive. After laying a platform of twigs and grass, the female builds up the walls with mud and more grass. While her mate stands guard against invaders, the female incubates the three or four eggs for eleven to fourteen days.
Apple Blossom ~ Pyrus coronaria The Apple Blossom's bright pink buds, opening to fragrant white, golden-centered flowers, are lovely to look upon. These blossoms are an unfailing foraging ground for bees, and over much of the country, a welcome symbol of advancing springtime. The five pistils and the many stamens with their yellow pollen grow in the center of the five-petaled flower. Bees and other insects carry the pollen grains from flower to flower. Botanically, apples belong to the rose family which includes most of our show flowering trees--cherry, plum, peach, pear, quince, and crabapple.
From The Wildflowers of the 50 States U.S. stamps issued July 24, 1992: