Data from: Preston's universal formula for avian egg shape

<p>The main data are 50 photographs of eggs, one from each of 50 species. </p> <p>25 of these species have pyriform eggs, based on the traditional usage of this descriptive term.</p> <p>The photographs were taken to allow an investigation of egg shape, so they are lit from behind to provide a clear silhouete and were arranged to have the plane containing their longest axis parallel to the 'film' plane.</p> <p>A csv file contains basic information about each egg.</p> <p>A second csv file contains the results of processing these photographs (using the script GetErrors.R) to assess the error associated with various methods of summarising egg shape, including Preston's universal formula.</p> <p>A third csv file conatins some summary information on many more eggs obtained from a different study.</p>