An eye for the ladies?

[Fangman]

The odd shapes of the pupils of visiting Wood pigeons intrigues me.

Up close and personal with the sigma 70-200 almost focused at its near point at 5ft.

 

[Fangman]

A few more examples of odd shaped pupils - you can see its view of me in the window in this eyefull!

 

[WesternGuy]

Interesting images. Is there a reason for this "odd shape"?

WesternGuy

 

[HL45]

Nice, almost comical with those eyes