Andy Trowbridge / Greenfinch (Carduelis chloris) perched on flowering European bird cherry (Prunus padus). Back-lit. Southern Norway. May.

Jim Brandenburg / Common Hackberry (Celtis occidentalis) tree at sunset, Blue Mounds State Park, Minnesota

Jim Brandenburg / Common Hackberry (Celtis occidentalis) and Sioux Quartzite, Blue Mounds State Park, Minnesota