Here is what a crawl looks like from my http access log.
ipaddress - - [21/Mar/2009:13:59:48 -0500] "GET /robots.txt HTTP/1.0" 200 603 "-" "Mozilla/5.0 (compatible; Yahoo! Slurp; http://help.yahoo.com/help/us/ysearch/slurp)"
ipaddress - - [21/Mar/2009:13:59:49 -0500] "GET /htj.html HTTP/1.0" 200 7552 "-" "Mozilla/5.0 (compatible; Yahoo! Slurp; http://help.yahoo.com/help/us/ysearch/slurp)"
ipaddress - - [21/Mar/2009:14:26:20 -0500] "GET /robots.txt HTTP/1.1" 200 603 "-" "msnbot/1.1 (+http://search.msn.com/msnbot.htm)"
ipaddress - - [21/Mar/2009:14:30:36 -0500] "GET /robots.txt HTTP/1.1" 200 603 "-" "msnbot/1.1 (+http://search.msn.com/msnbot.htm)"
here is an entry from a web browser
ipaddress - - [22/Mar/2009:15:40:26 -0500] "GET /style.css HTTP/1.1" 200 3059 "http://farriscreeklodge.org/" "Mozilla/5.0 (X11; U; Linux x86_64; en-US; rv:1.9.0.6) Gecko/2009021619 Mandriva/1.9.0.6-0.1mdv2009.0 (2009.0) Firefox/3.0.6"
ipaddress - - [22/Mar/2009:15:40:26 -0500] "GET /images/valid-xhtml10-blue.png HTTP/1.1" 200 2026 "http://farriscreeklodge.org/" "Mozilla/5.0 (X11; U; Linux x86_64; en-US; rv:1.9.0.6) Gecko/2009021619 Mandriva/1.9.0.6-0.1mdv2009.0 (2009.0) Firefox/3.0.6"