This FAQ (<a href="http://www.birds.cornell.edu/pfw/AboutBirdsandFeeding/FAQsBirdFeeding.htm#Where_birds">http://www.birds.cornell.edu/pfw/AboutBirdsandFeeding/FAQsBirdFeeding.htm#Where_birds</a>) says:<div><br></div><div>
"<span class="Apple-style-span" style="color:rgb(0,0,153);font-family:Times;line-height:normal;font-size:medium"><img src="http://www.birds.cornell.edu/pfw/images/snowflake.gif" width="22" height="21"><a name="Where_birds"> <font face="Geneva, arial, sans serif" color="#336666"><font size="4" face="Verdana, Arial, Helvetica, sans-serif">Where did all the birds go?</font></font></a></span></div>
<span class="Apple-style-span" style="color:rgb(0,0,153);line-height:normal;font-size:medium"><p style="font-family:Times"><font face="Geneva, arial, sans serif">While it is impossible for us to know the cause of each local increase and decline, there are several common causes for bird population fluctuations.</font></p>
<ul style="font-family:Times"><li><font face="Geneva, arial, sans serif">Habitat changes affect bird populations. If there has been a change in your neighborhood, such as trees being cut down or new houses being built, that could be the reason you are seeing a decrease in birds.<br>
</font></li><li><font face="Geneva, arial, sans serif">Natural food supplies--such as cones, berries, seeds, and insects--fluctuate from year to year, causing birds to shift ranges to take advantage of food surpluses or to compensate for food shortages.<br>
</font></li><li><font face="Geneva, arial, sans serif">Weather patterns often cause birds to shift ranges, especially in winter.<br></font></li><li><font face="Geneva, arial, sans serif">Birds of prey sometimes move into an area causing the local birds to feed elsewhere until the predator moves on.</font></li>
</ul></span><div><span class="Apple-style-span" style="color:rgb(0,0,153);font-family:Geneva,arial,'sans serif';line-height:normal;font-size:medium">Bird populations normally fluctuate from one season to the next and from one year to the next. Sometimes, however, there are significant, long-term changes in the numbers of particular birds in certain areas. To learn about such long-term trends, visit the Exploring Data portion of this web site.</span>"<span></span><br>
<br>By the way, I love this website, and if you are inclined to participate in being a Citizen Scientist, you can participate in "Project Feeder Watch". Learn more here: <a href="http://www.birds.cornell.edu/pfw/Overview/over_index.html">http://www.birds.cornell.edu/pfw/Overview/over_index.html</a></div>
<div><br></div><div>Or you can just enjoy the birds. :-)</div><div><br></div><div>-Sarah<span></span></div><div><blockquote class="gmail_quote" style="margin:0 0 0 .8ex;border-left:1px #ccc solid;padding-left:1ex"><div bgcolor="#FFFFFF" text="#000000">
<br>
</div>
</blockquote></div>
<br><br>-- <br>.....................................................................................................<br>Sarah Wayland | <a href="http://www.GuidingExceptionalParents.com" target="_blank">www.GuidingExceptionalParents.com</a><br>
Supporting students with learning differences and their families<br>