Deer are active in the park through which I ride to/from work this time of year, being mating seaon. The bucks will chase does across the street without regards for anything around them. I frequently see small herds running near the edge of the street.
Unfortunately, this season also brings out the Gawker - usually little old ladies in Subarus who gaze upon this natural wonder before them, and allow their cars to drift across the lane into the shoulder where yours truely is biking. (Okay..."little old ladies in Subaru's" is a generality, but it was an actual occurence yesterday).
Strangely, drivers are willing to patiently slow down for deer in the street (and disinclined to lay on their horn), but not always so willing to show the same courtesy for cyclists. Maybe I should put antlers on my helmet and hang a white furry tail from my rear rack! 
2007 Seven ID8 - Bontrager InForm
2003 Klein Palomino - Terry Firefly (?)
2010 Seven Cafe Racer - Bontrager InForm
2008 Cervelo P2C - Adamo Prologue Saddle