:: I added this (non-scientifcally) measured speed 242 mph to the article. It is reported by National Geopraphic. The references to other speeds do not refer to any measurements (scientific or not), so I think this one is not less importnant. Of course wind (shears), downbursts, and other factors might (positively) influence the result. However, many of the bird max speed numbers are in fact estimates (from the half of the 20th century).