why do animals move in sync to find out we visit biologist alex jordan at the max planck institute in konstanz in southern germany he describes diving among a shoal of fish they were moving around me in this in this rhythmic pattern and i could hear it really whoosh whoosh as i swear through and i could see nothing but a wall of fish and it was so dramatic an amazing. choreography without a choreographer but how does it work in the past swarm behavior was believed to function according to quite simple rules such as follow the leader or dodge the predator but now researchers have revised their opinion. we know that in these systems individuals differ individuals differ in how they perceive information in the threshold that they respond in so many aspects they are not automate all but with sort of approaches that we're now able to take especially in the field in natural conditions we can ask those questions by tracking all of the individuals and monitoring their identity throughout time. but how do these individuals come together to form a group understanding that might also help us to understan

certificate makes a great mental but even better is a vacation video and that's what moved me from konstanz has sent us he's been to mexico thank you vish here's your video. well again that's. back in front i go to bomb barrack i have booked a city to a. production yard was god has a hello welcome to bung them into our guided tour bumbag is a town with more than one thousand years of history and it became a unesco world heritage site twenty five years ago school when the stuff we see please come into the cathedral with me now so good. so visit we're now in bumbag cathedral the first cathedral here was commissioned in one thousand four by the emperor haile and his wife who were later canonized. what's here now is the third cathedral from the thirteenth century it was billed as a pilgrimage church rather than a parish church so the focus is on the tomb of the saints. so of us what you see here is the only marble piece in the church on the lid are the recumbent figures of the two saints. on its side are legends so when sit down here from here you have a lovely view of the back horseman what wa

sometimes they don't that's why they're a good species to study even here in laboratory conditions in konstanz the researchers have recreated late conditions and stocked up with different species of sequoia some are very sociable while others aren't this species will be much less likely to tolerate an intruder. like me coming into the territory it simply will ouch not let me go anywhere here. so why isn't the secluded swimming in a shoulder. the world is cruel and if you're alone and individual istic that can be very high as it is situation the luxury afforded by this safe vironment relaxes the pressure on conformity and collective processes perhaps we start to see individuals acting individual stickley. one result of the research the animal swimming or shoulder because it improves their chances of survival jordan records the shoals movements with video cameras and a computer program that identifies the individual fish recorded in the images the goal is to be able to look at a scene like this and have our computational algorithms pull out the fish for us tell us who they are where they are and