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Portable Network Graphic  |  1995-11-22  |  80KB  |  640x480  |  8-bit (158 colors)
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OCR: REGULAR AND RARE Birds REGULAR rearly 1.000 species of birds can be found What in North America. About 700 of these per centof breed or visit on a regular basis and another birds ar 300 or so species are rare accidentals, strays reeuar and other less commonly seen birds. Bird populations vary species. and bird populations and their distributions change over time Every bird that we see today What will be reflects onlx a moment in that species gone tomorrow evolutionary historv on Earth RARE Eastern Strays Is this Greater Shearwater regular or rare? Alaskan Does regular mean Strays abundant Oceanic South western Strays Strays Florida Strays Western Strays Exoties Extinet or Extirpated eeuar only momen history