Figure 1
From: A Physics-Inspired Mechanistic Model of Migratory Movement Patterns in Birds

Environment data plots41 for April, averaged over all raw data between 2003 and 2010. (a) Chlorophyll concentration data38. Plotted as logarithm of actual value to highlight distribution patterns. Inland lakes excluded using ocean shapefile40. (b) Wind data42. Length of arrow indicates wind magnitude.