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This bizarre-looking creature is a long-wattled umbrellabird. The wattle hanging from its chest is a sexual ornament: the umbrellabird equivalent of the peacock's tail. Males display it to attract females. Ditto the Elvis quiff. Sexual selection really went to town on birds.pic.twitter.com/322Z1zcpzx
What is it about birds that makes sexual selection so important? That females have a lot of options because they can fly?
Mobility makes love more than just a proximity infatuation.
Long term pair bonding makes it a bigger investment.
there are about 10x more bird species than mammals. Many are in isolated islands and with no shortage of food, they have evolved for this
Once the female in any species has a choice evolution becomes influenced by “beauty”. There is a great book about this:https://www.amazon.com/Evolution-Beauty-Darwins-Forgotten-Theory/dp/0385537212 …
Would this indicate women have only relatively recently had a choice? Or has the growth of “beauty” in men been within non physical traits such as intelligence, wit, compassion, music, so on? This could explain why we say things like beautiful mind, beautiful on the inside, ...
Was going to link to Prum’s book as well. Fascinating, overlooked part of evolution, also by Darwin.
They catch flights not feelings 
Aka Tinder Passport?
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