To solve the puzzle

you must recognize the clues.Robins in the woods for instance signal the emergence of berries,later it will be people bent over along the roadsides.Yet there are no botanical maps that pinpoint where the individual plants exist in any one area.The plants and creatures of the forest form fleeting food banks that are plentiful for only a short time.Then another source must be found.Although I think only the snakes eat them,up here the little brown toads are one of the earliest to hatch and gather in large numbers.Then after a couple of weeks, it is the frogs and after them the baby turtles and grasshoppers for example.If any of them apply to Bigfoot,nobody knows or is telling.So solving the puzzle and finding the clues is not easy,nor will it ever be.To think you can wander around in large forested area with with six buddies & night vision glasses and find a bigfoot or two is absurd.Keep your city jobs and stay home.There are too many unknown clues and unknown, unmapped and unanticipated Bigfoot resources in any one area to keep a real scientific team busy for five lifetimes.If you still want to do it,do it in ways different from what they constantly show on tv does not work! Look at it this way.If you were to drift down a river in the dark with night vision and night filming capability.Why in the world would you or anyone with a brain cell blast out an unconfirmed Bigfoot howl? Essentially destroying the few stealth advantages your other equipment and efforts provide you.