This is not a tornado in Namibia. Where is the flying sand? This is the shadow cast by the edge of a sand dune in Namibia. The picture was entered in the Italian National Geographic photo contest by Francesco Middei.
Why are ladybugs considered a "beneficial" insect? Ladybugs feed on aphids and other soft bodied insects that feed on plants. The ladybug feeds on these pests as the adult ladybug and as the larva. One ladybug can eat as many as 50 aphids a day.