[antiquark]

Bad article.

>The clumsy wings of males could be rationalized as a handicap that provides information about the birds’ condition or genetic quality.

Also known as an honest indicator of fitness.

>But the observation that female club-wings have also probably made themselves less capable fliers can only be described as decadent —

Why the "probably" there? Previously the author mentioned that the bones where hollow in the females, unlike the males. Maybe they can fly just fine!

>sexual selection leading to a decline in the capacity for survival.

Yeah but, the fact that they exist, shows that they have survived.