However, ask the same questions about the photo here. Which is the male dove, and which is the female? Which one is more attractive?
Now it becomes impossible. In many animals and birds, there is no way that you and I, intelligent human beings, can tell the difference. But, they can! And, they can do it even if there are many of them sitting together! They can also precisely determine which one is their mate, too! And they all look exactly the same to us!
Take it a step further. One dove, or cardinal, or robin... or baboon, or impala... or any bird and animal you can name, will make a call that sounds, to us - to our ears - exactly like any other dove, or cardinal, or robin. But, to them, they know precisely if it's their mate - or mother, or baby - that's communicating to them.
How do they do this?! The answer lies somewhere in the exact and particular design of each creature. The differences in appearance and sounds are so subtle that we humans cannot possibly perceive them. Design is so rampant here that it becomes completely futile - unless a person chooses to be blind - to try to imagine these things happening on their own, by random chance.
As I've said before, design indicates a designer. This is not rocket science. The world of nature is choked with examples. And, the Bible tells us that the Designer is Jesus!