![](https://blogger.googleusercontent.com/img/b/R29vZ2xl/AVvXsEhuNaiK0iq4Z4drFYx39OGHIA-fRJZjJ75FLdFm7FOd5qx3TxDSkPLu-hHgEt506aGKJML2i34F9mO97QkVr4hHKpmVrk7cjA4JO1JC0eMhA49jVQnp7C53LyQdZS2pQJNWdgMvj3nlWKk/s400/_DSC0201%255B191%255Dr+%2528White-crowned+Sparrow%2529.jpg)
![](https://blogger.googleusercontent.com/img/b/R29vZ2xl/AVvXsEi5EjxZNqHOOfD0txPRm5Dw02Zy4LTdAFunLbEEXa2rZFJq0PFmDswyvaOps1cMHLt87kb3MJ4nE8kiuqUqw6u7jhoUWRJCr1X-tzC8prwdHkMLhfDhyRf_vkWDVye9DC5wafwbzlis_t8/s400/_DSC0205%255B191%255Dr+%2528White-crowned+Sparrow%2529.jpg)
![](https://blogger.googleusercontent.com/img/b/R29vZ2xl/AVvXsEjYrAB-H-oF6p237cPJwwlQOR_PBfflz5rWfvZAedfpQAKy3eB9ffNFwuiAjOfAiI9qy5HNRin9IIVmPL0RPo3K9ri634yNPEyNUOo6Qlgf6qu_OPWt1OAHYeISVe7a3PVunJrZh1CEF5o/s400/_DSC0217%255B191%255Dr+%2528White-crowned+Sparrow%2529.jpg)
![](https://blogger.googleusercontent.com/img/b/R29vZ2xl/AVvXsEhwMs68C-_cNN1WgHJ1BSMdtfBFktaRdfFEpZq8iSlaLnHNs87kAl9E3zpQPQJig49mcK9daVbrJrIduyMJhahQkl5Du1TbpAAvSAfDegfpJD_ohET3zzL_fgyZ6UeWBXxuuTHwQr3j5Mg/s400/_DSC0214%255B191%255Dr+%2528White-crowned+Sparrow%2529.jpg)
I took these pictures along Lands End Trail in San Francisco on May 2. White-crowned Sparrows were easily the most numerous sparrow along the trail. The one in the pictures above was building a nest in the tall grass very near the trail. I watched as it would fly a short distance away to find some dried grass, sometimes yanking and shaking it to free it from the ground or untangle it from the brush.
I thought I may have found a new life bird. The mixture of brown and black on its crown was not something that I had seen before, but when I took a closer look on my computer I am pretty confident that this is a young White-crowned that is transitioning from the brown striped crown of a juvenile to the black and white crown of an adult.