Our Big Day

Our big birding day, that is. San Diego County has more species of birds than any other county in the United States: 520 species. On Global Big Day, Eric and I set out to see as many of them as we could. We have a lot of birds because we have a lot of geography; …

How does birdsong work?

I was surveying the bone-dry San Luis Rey riverbed recently, performing autopsies on crunchy, senescing weeds, when I had a revelation in sound. I heard a newborn bird learning to sing. First, from a nearby willow, drifted the adult Vireo’s song: a well-formed, two-part warble. Then came baby’s: a squeaky, unfinished attempt tapering into hesitating …