We developed Natural Earth as a convenient resource for making custom maps. Unlike other map data intended for scientific analysis or military mapping, Natural Earth is designed to meet the needs of production cartographers using a variety of software applications. Maximum flexibility is a goal. Natural Earth Vector comes in ESRI shapefile format, the de facto standard for vector geodata.
A gizzard is a sack like organ at the back of the earthworms throat. The gizzard basically chews the earthworm's food since the worm doesn't have any teeth. The crop is a thin â¦ ner organ closer to the head. The crop stores food.
Not all birds have gizzards, but the birds that have them use them to their full extent. Turkeys are able to grind steel needles with their tough gizzards. An owl gizzard is a special organ that is only present in birds of prey. The gizzard breaks down the feathers, fur, bones and teeth of the prey.