Long billed curlew - Why would a bird's beak be so very long?
A long-billed curlew I photographed in San Francisco with a shrimp it just caught. I have to admit to a fascination with shorebirds. And I was beyond ecstatic when, while walking along Golden Gate Beach, I came across a curlew hunting for food. Now, I have seen other birds with long bills, such as spoonbills, pelicans, storks, and so on, but the curlew did something I did not at all expect. The long-billed birds I usually see feed by probing the water or substrate's surface. Not this bird. It walked along a muddy plane, its feet spread wide to keep it from sinking into the soft mire, and plunged its bill deep into the sediment. Right up to its eyeballs. Not an inch or two, all eight or so inches. And it came up with a prize. Have a look at the three consecutive images below that I took. You can see that the water is only superficially covering the soft mud. The curlew plunges its bill deep under the surface, so deep, in fact, that it...