Striated Pardalote

An Eastern Striated Pardalote (Pardalotus striatus ornatus) with nesting material in its mouth. This subspecies of the Striated Pardalote, the least colourful and most common of the four pardalote species, is found in subtropical areas of Eastern Australia. They are more often heard than seen, foraging noisily for lerps and other small creatures in the treetops.

Male mallard in mid-flight

A male Mallard in mid-flight. The fundamentals of bird flight are similar to those of aircraft. Lift force is produced by the action of air-flow on the wing, which is an airfoil. This occurs because the air has a lower air pressure just above the wing and higher pressure below. When a bird flaps its wings they continue to develop lift but they also create an additional forward and upward force, thrust, to counteract its weight and drag.

US Capitol Building

The United States Capitol at night. The U.S. Capitol serves as the location for Congress, the legislative branch of the U.S. federal government. It is located in Washington, D.C., on top of Capitol Hill at the east end of the National Mall. The building is marked by its central dome above a rotunda and two wings. It is an exemplar of the Neoclassical architecture style.