各主流搜索引擎爬虫蜘蛛的User_Agent大全

百度爬虫，第二条为百度图片爬虫

Baiduspider+(+http://www.baidu.com/search/spider.htm")

Baiduspider-image

google爬虫，最后一条为google图片搜索爬虫

Mozilla/5.0 (compatible; Googlebot/2.1; +http://www.google.com/bot.html)

Googlebot/2.1 (+http://www./bot.html)

Googlebot/2.1 (+http://www.google.com/bot.html)

Googlebot-Image/1.0

即刻搜索爬虫

Mozilla/5.0 (compatible; JikeSpider; +http://shoulu./spider.html)

雅虎爬虫（分别是雅虎中国和美国总部的爬虫）

Mozilla/5.0 (compatible; Yahoo! Slurp China; http://misc./help.html")

Mozilla/5.0 (compatible; Yahoo! Slurp; http://help.yahoo.com/help/us/ysearch/slurp")

新浪爱问爬虫

iaskspider/2.0(+http:///help/help_index.html")

Mozilla/5.0 (compatible; iaskspider/1.0; MSIE 6.0)

搜狗爬虫,第三条为搜狗图片爬虫

Sogou web spider/3.0(+http://www.sogou.com/docs/help/webmasters.htm#07)

Sogou Push Spider/3.0(+http://www.sogou.com/docs/help/webmasters.htm#07)

Sogou Pic Spider/3.0(+http://www.sogou.com/docs/help/webmasters.htm#07)

搜搜爬虫

Sosospider+(+http://help.soso.com/webspider.htm)

网易有道爬虫

Mozilla/5.0 (compatible; YoudaoBot/1.0; http://www.youdao.com/help/webmaster/spider/; )

MSN爬虫

msnbot/1.0 (+http://search./msnbot.htm)