1, draw a lying letter "s" line, as shown.
2. Draw an arc, as shown.
3. Draw the whale's mouth, as shown.
4. Draw the whale's eyes, as shown.
5. Draw a whale's fin, as shown.
6. Draw the whale's fin again, as shown.
7. Draw the spray on the whale's head, as shown.
8. Draw the whale's tail, as shown.
9. Draw the ripples around the whale, as shown.
10, color the whale picture, as shown.
Morphological characteristics:
Killer whales are the largest species in the dolphin family. The average length of adult males is 8 meters, and the record is 9.75 meters. The female weighs 3.8 tons and the male weighs 5.5 tons. The average length of females is 7 meters, and the maximum length is 8.5 meters. There are obvious sexual dimorphism in body size, fin limb size and dorsal fin height. The average weight of females is slightly smaller than that of males.
The maximum length of females is 7.70 meters, and that of males is 9 meters. 1 female with a head length of 6.70 meters weighs 3.8 tons, while 1 male with a head length of 6.75 meters weighs 5.5 tons. The dorsal fin of the male adult is upright, and the height can reach 1.0- 1.8 meters, while the dorsal fin of the female is obviously sickle-shaped and less than 0.7 meters high. The fin bends to the right or left.
The length of condyle base of adult skull can reach 1000 mm. The width across the two premolars in front of the orbital fovea is smaller than the width of the snout. The two wings are far apart. The temporal fossa is large. The mandible is relatively short. Having an inconspicuous beak. Elliptical flippers are located at the front 1/4 of the whole body length. Male flippers can reach 20% of the total body length, and female flippers can reach 1 1%- 13%. The width of the tail leaf can exceed 1/5 of the whole body length.
Killer whales are spindle-shaped with a smooth surface, and there is a thick layer of fat under the skin to preserve the body's heat. The color of the body is black and white, the back is painted black, there is a saddle-shaped gray spot behind the fin, and there is a spindle-shaped white spot behind each eye, and the ventral surface is mostly white.
The mandible and the ventral surface from the front of the mandible to the urogenital area are white. There are 1 white leaflike spots extending upward from the urogenital area to the body side behind the dorsal fin. The ventral surface of the tail leaf is white or light gray, and may have a black edge. There are 1 white oval spots on each side of the eye. Saddle spot is not obvious when young, but more obvious after sexual maturity.