A specific application of a general paradigm described by R. D. Cook (1986) and R. McCulloch (1985) in assessing local influence is given. Snow geese flock size is estimated as "X" by an observer and "Y" by a photograph. "Y" is believed to be the true flock size. The problem is to obtain true flock size "Z" for flocks not photographed but with a size estimated as "W" by the same observer. Predictive distribution of flock sizes is discussed. Four sample graphs or plots of data are presented. (SLD)