休闲类搜索引擎及目录索引
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观鸟 Birding：
Rarebirds.com
- An online database that allows you to enter your interesting bird
sightings, browse and search sightings by other birders, and receive
up to the minute alerts.
UK
Birdwatching Links - Directory lists sites and pages of interest
to birdwatchers in the UK. Also covers books, news, holidays, accommodations,
etc.
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