Michael L. said:
I am watching the show right now. I am a bit annoyed that they speak of the inability of people to identify the size of something in the sky with no point of reference as if we only make things larger. If you saw a twenty four foot bird soaring at two or three hundred feet in the air out of the corner of your eye, wouldn't your brain register it as a smaller bird flying lower to the ground? Also, they flew a 24 foot kite and some people were crazy in their estimates but several other were with 25% (27.5 feet, 30 feet...). Perhaps a better, more useful, bit of research would have been to collect estimates and try to establish a statistical model of the estimates. Then we may be able to say "The majority of people mis-estimate by XX%, so we will adjust all estimates by this amount to determine if there is a species that falls within this measurement as well."
Also, they kind of ignored in that segment that the footage from the 70's started with that bird in a tree. I was a bit shocked that they didn't go to Lake Shelbyville (call me History Channel; I have professional cameras and it is only a couple hours from St. Louis) to see if they could find the trees to make a measurement...