Group+3

This is for Group 3 - Yi Lei's group

Killer whales live in ewaters ranging from tropical to artic and both coastal and deep oceanic waters. They are found in all the world's oceans and in most seas. Killer whalessometimes enter estuaries but don't go far out from the sea. Altough they are sometimes spotted in deep waters, coastal areas are generally preffared to killer whales. They are making a bigger presence in California too. They are regularly sighted in the Argentina and Antartic waters. Killer whales are mostly found in Washjington, California,Baja California, and along the eastern borders of United States. Killer whales have a well-developed,acute sense of hearing ,early studies suggested that the hearing range of the killer whales was about 0.5 to 31khz.More recent studies on younger whales discovered that the whales could hear sounds at frequencies as high as 100khz.Greatest sensitivity is about 15khz.A toothed whale's small external ear openings don't seem to be important in conducting sound.They lead to reduced ear canals that are not connected to the middle ears.