NAVIGATION

NAVIGATION

STAR (STELLAR) NAVIGATION• Birds that migrate at night use a star compass

North Celestial pole

There is a point in the northern sky about which the stars seem to rotate its called the….

Birds were shown to orient towards the part of sky that rotates the least

It’s experimenting time!!!

Birds were placed in a dome like theatre with stars projected on the ceiling

The birds oriented to the fake sky!

Further experiments show that they only orientated towards the brightest northern stars because they move the least during the night

CHEMICAL NAVIGATION

Dogs follow scents to find home and ants leave chemical trails for other

ants to follow.

Crazy

Fact!!!!If you block a salmons nose they can miss crucial

turns in rivers because they can’t detect the chemicals for the correct path!

SOUND USED AS SONARBats navigate by using high pitched squeaks which bounce off objects in their path

Humpback whales orientate themselves by sonar. They have excellent hearing and a big range of clicks and booms

Infrasound Humans can’t hear a frequency of less than 1Hz but it has been shown that pigeons can hear less than 0.06Hz.

Infrasound travels very long distances so the pigeons use the natural sources of infrasound like crashing waves, as a mean of navigation.