Welcome to DU! The truly grassroots left-of-center political community where regular people, not algorithms, drive the discussions and set the standards. Join the community: Create a free account Support DU (and get rid of ads!): Become a Star Member Latest Breaking News Editorials & Other Articles General Discussion The DU Lounge All Forums Issue Forums Culture Forums Alliance Forums Region Forums Support Forums Help & Search

Birders

zipplewrath

(16,698 posts)

9. Dubious

Reply to pwb (Reply #4)

Thu Mar 15, 2018, 08:43 AM

Mar 2018

Animals don't have out ability of abstraction. They rarely can look at something in 2-D and recognize it as the 3-D object. And since these aren't moving, they probably don't really recognize it as a "bird in flight". It's just a "black spot on a window".

Click here to purchase valentine hearts!