Identification and Classification

Box Turtles are the most common terrestrial turtle in the eastern United States. They are small to medium sized turtles, attaining a maximum length of about 8 inches and having a highly domed carapace. A key characteristic of box turtles is their hinged plastron (bottom of the shell) that can be shut completely to exclude predators. Although mud, musk, and blandings turtles also posses hinged shells, they cannot be closed completely. Superficially, box turtles resemble tortoises but they are actually more closely related to many aquatic turtles and belong to the same family as spotted, bog, chicken, map, and painted turtles, as well as sliders, cooters, and diamondback terrapins. Box turtles in the United States are divided into two species, the eastern box turtle (Terrapene carolina), which ranges from Texas throughout the southeast and north to Michigan and southern Massachusetts, and the western box turtle (Terrapene ornata), which ranges west of the Mississippi to Colorado and New Mexico. The western box turtle is superficially similar to the eastern box turtle but is typically smaller and has a shell marked with radiating yellow lines. There are an additional two species of box turtle that are endemic to restricted habitats in Mexico. One of these species (Terrapene coahuila) is almost totally aquatic.
Eastern box turtles are highly variable in shell shape, pattern, and coloration. Based on these differences, four subspecies of eastern box turtles have been designated. The most widespread subspecies is simply known as the eastern box turtle (T. carolina carolina). This turtle ranges along the entire east coast of the United States from Massachusetts to northern Florida, as far west as the Mississippi River, and north to the Great Lakes. Although this subspecies is highly variable in coloration, it is often more brightly colored than the other subspecies and almost always has four claws on the hind feet.
     The box-shadow CSS property accepts one or more shadow effects as a comma-separated list. It allows casting a drop shadow from the frame of almost any element. If a border-radius is specified on the element with a box shadow, the box shadow takes on the same rounded corners. The z-ordering of multiple box shadows is the same as multiple text shadows (the first specified shadow is on top).
Initial value : none Applies to: all elements Inherited : no Media: visual Computed value : as specified (any <length> made absolute; any <color> computed) Values inset (optional) If not specified (default), the shadow is assumed to be a drop shadow (as if the box were raised above the content).
The presence of the inset keyword changes the shadow to one inside the frame (as if the content was depressed inside the box). Inset shadows are drawn above background, but below border and content. <offset-x> <offset-y> (required) This are two <length> values to set the shadow offset. <offset-x> specifies the horizontal distance. Negative values place the shadow to the left of the element. <offset-y> specifies the vertical distance. Negative values place the shadow above the element. See <length> for possible units.
If both values are 0, the shadow is placed behind the element (and may generate a blur effect if <blur-radius> and/or <spread-radius> is set). <blur-radius> (optional) This is a third <length> value. The larger this value, the bigger the blur, so the shadow becomes bigger and lighter. Negative values are not allowed. If not specified, it will be 0 (the shadow's edge is sharp). <spread-radius> (optional) This is a fourth <length> value. Positive values will cause the shadow to expand and grow bigger, negative values will cause the shadow to shrink. If not specified, it will be 0 (the shadow will be the same size as the element). <color> (optional) See <color> values for possible keywords and notations.
If not specified, the color depends on the browser. In Gecko (Firefox), Presto (Opera) and Trident (Internet Explorer), the value of the color property is used. On the other hand, WebKit's shadow is transparent and therefore useless if <color> is omitted.