by David Hoyt
Do birds have a sense of beauty? Do they, or does any animal, have an aesthetic sense? Do they respond to beauty in ways we might find familiar – with a feeling of awe, suffused with attraction, mixed with joy? Do they seek it out, and perhaps even work to fashion it from their surroundings? Darwin thought so, and made the idea the subject of his second major work, The Descent of Man (1871). In it, he outlined a mechanism by which the sense of beauty might, by shaping mating preferences, work to shape the form of insects, fish, and birds in a manner parallel to the better known process of natural selection. The resulting beauty of form, sound, or movement, Darwin argued, is neither the result of intelligent design, nor a necessary indication of superior fitness. Beauty, as Richard Prum has put it, simply happens – but in an organized, understandable way that leads to the dazzling primary feathers of a Peacock, or the bewitching song of a Wood Thrush.
The idea was, as ornithologist Matt Ridley calls it in the subtitle of his recent book, Darwin’s “strangest idea.” It is probably safe to say that the idea, known as sexual selection, was also his most original, and perhaps even most controversial, even more so than the idea of a blind transformism capable of achieving astounding organic adaptations over time. Though it made steady headway after it was introduced, natural selection was challenging enough for many to accept in the second half of the nineteenth century. Sexual selection, on the other hand, premised as it was on idiosyncratic female preference driving the evolution of ever-more varied and harmonious displays among male suitors, was, in the late Victorian period, simply a step too far. As a number of recent authors on the subject have noted, including Ridley and Prum, by the early twentieth century the idea was ushered out the door like an embarrassing dinner guest.
How this happened is a story that has not been fully told outside the confines of ornithology or the history of biology. Read more »



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