<div dir="ltr">In the Washington D.C. area all or nearly all the spring "blue-orchard bee" sized holes are filled with just <i>O. cornifrons </i>and <i>O. taurus</i> (both Asian species) in the spring. <i>Osmia lignaria </i>is quite uncommon as a species. Smaller diameter holes and larger holes later in the season seem to get a greater diversity of nesting species of bees and wasps, but I haven't made and exacting study of it.<div><br></div><div>sam</div><div><br></div><div><div>Sam Droege <a href="mailto:sdroege@usgs.gov">sdroege@usgs.gov</a> </div><div>w 301-497-5840 h 301-390-7759 fax 301-497-5624</div><div>USGS Patuxent Wildlife Research Center</div><div>BARC-EAST, BLDG 308, RM 124 10300 Balt. Ave., Beltsville, MD 20705</div><div><a href="Http://www.pwrc.usgs.gov">Http://www.pwrc.usgs.gov</a></div><div><br></div><div>"...and though the holes were rather small, they had to count them all..."</div><div><br></div><div>A day in the life.</div><div>Sargent Peppers</div><div>Beatles</div></div></div><div class="gmail_extra"><br><div class="gmail_quote">On Thu, Jan 28, 2016 at 7:38 AM, matthew feldman <span dir="ltr"><<a href="mailto:matthew.ean.feldman@gmail.com" target="_blank">matthew.ean.feldman@gmail.com</a>></span> wrote:<br><blockquote class="gmail_quote" style="margin:0 0 0 .8ex;border-left:1px #ccc solid;padding-left:1ex">A year ago the article was published from Australia about how bee<br>
houses hold mostly invasive bees. Has anyone seen more research about<br>
this?<br>
<br>
<br>
<a href="http://journals.plos.org/plosone/article?id=10.1371/journal.pone.0122126" rel="noreferrer" target="_blank">http://journals.plos.org/plosone/article?id=10.1371/journal.pone.0122126</a><br>
<br>
<br>
thanks,<br>
<br>
Matt<br>
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</blockquote></div><br><br clear="all"><div><br></div>-- <br><div class="gmail_signature"><div dir="ltr"><div style="text-align:center"><i><b>Bees are Not Optional</b></i></div><div style="text-align:center"><i><b><font size="1">Apes sunt et non liberum</font><br></b></i></div></div></div>
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