with the size and appearance of a slimmed-down reader 's DIGEST , the less famous BIRD WATCHER 's DIGEST be a chirpy little optimist of a magazine not so very different from , say , a black-capped chickadee . short and moderate-sized article cover specific species , how-to\/techniques , choose the right birding equipment , and joy-of-birding anecdote . advertisement abound but do not overwhelm . some be quite helpful . bwd be a perky standard for birder both casual and serious .