http://materialsman.com/2009/07/opportunistic-sand-martins/ Construction materials and bird watching anecdotes Mon, 06 Sep 2010 18:16:20 +0000 http://wordpress.org/?v=2.9.2 hourly 1 http://materialsman.com/2009/07/opportunistic-sand-martins/comment-page-1/#comment-254 Ian Sat, 25 Jul 2009 10:34:08 +0000 http://materialsman.com/?p=602#comment-254 Well, I'm guessing the land will be ear marked for something else, plus the artificial ones are more predator and weather erosion proof. Also if one is man made and successful, the engineers and workmen will carry that knowledge throughout their working lives. Well, I’m guessing the land will be ear marked for something else, plus the artificial ones are more predator and weather erosion proof. Also if one is man made and successful, the engineers and workmen will carry that knowledge throughout their working lives.

]]> http://materialsman.com/2009/07/opportunistic-sand-martins/comment-page-1/#comment-251 derek smart Thu, 23 Jul 2009 20:39:53 +0000 http://materialsman.com/?p=602#comment-251 Why not simply just leave it the way it is now. Why not simply just leave it the way it is now.

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