The file 'Crows Feeding 3D Printer Model' is (obj,stl,wrl,x3d) file type, size is 4.2MB.
edit online here https://tinkercad.com/things/beGyN46HSWy-crows-feedingmade with http://www.thingiverse.com/thing:182120and http://www.thingiverse.com/thing:302040