Crossley ID Guide
gregladen | April 5, 2013A couple of years back, the The Crossley ID Guide for Eastern Birds came out and it caused a huge splash in the birdwatching world. For some time now it has become apparent that bird watching, especially the identification part of it, was changing in its approach. We describe it this way, though I think the reality is more complex: In the old days we used logical links to known reliable field marks to turn carefully made field observations into species identifications of varying degrees of certainty. Now, a new approach has been developed where we look at the whole bird and get an…