地图龟
Map Turtle
「Graptemys is a genus of freshwater turtles…」
Graptemys is a genus of freshwater turtles containing 14 species, commonly known as map turtles. Graptemys are small to medium-sized turtles that are significantly sexually dimorphic, with females in some species attaining as much as twice the length and ten times the mass as males. Depending on the species, adult males range from 7–16 cm (2.75–6.25 in), adult females 10–29.5 cm (4–11.62 in), and hatchlings 2.5–3.8 cm (1–1.5 in), although some sources indicate female Barbour's map turtles grow to 33 cm (13 in) in length. Most species have a distinctive dark pigmented keel that is often notched or serrated running down the center of the carapace and serrated scutes on the rear margin. The head, neck, and limbs exhibit bold patterns of yellow lines and spots against darker green, olive, or b
简介暂为英文公开资料摘要,后续将逐步整理为手册口吻。
地圖龜屬 又名圖龜屬，通称地圖龜，为龟鳖目泽龟科鸡龟亚科的一属，是淡水龜，分佈在美國東部及加拿大南部。牠們的外表很像其他泽龟科龟类，如伪龟属（Pseudemys）及彩龜屬（Trachemys），但較為細小及在龜殼中央有一道鋸齒狀突出物，牠們的龜殼紋像地圖，故得此名。壽命可達15-20歲。
资料来源 · 维基百科（CC BY-SA）
🥣饮食
Map turtles are more carnivorous than most other members of the family Emydidae, and this includes the northern map turtle. Adult females have wide heads, strong jaws and broad alveolar crushing surfaces in their mouths which they use to feed on molluscs, their primary prey, as well as insects and crayfish. Adult males are much smaller and have narrower heads and feed on smaller molluscs and insects. Like most other aquatic turtles, feeding always takes place in the water. In places where invasive molluscs such as zebra mussels and Asian clams (Corbicula fluminea) are abundant, they may become
🏠照料
The northern map turtle inhabits ponds, rivers, and lakes. They prefer large bodies of water and areas with fallen trees and other debris for basking. These turtles are more often found in rivers than in lakes or ponds. They are found in larger rivers and lakes in the northern portion of their range but are more likely to live in smaller rocky rivers and streams in the south and west. Since they are turtles, naturally they need the sun to survive.
👁形貌
The northern map turtle gets both its common and scientific names from the markings on its carapace, which resemble contour lines on a map or chart. These lines are usually shades of yellow, tan, or orange, and are surrounded by dark borders, with the rest of the carapace being olive or greyish brown. However, the carapace markings tend to fade as the animal matures, and in older individuals are usually only visible when the shell is wet. The carapace has a hydrodynamic appearance and is broad with a moderately low keel. The rear of the carapace is flared and the rear marginals form serrations