A bird nest on the top of a catenary mast, between various switches and wires.
Seen on the highspeed line Cologne-Frankfurt between Siegburg station and the
Siegauentunnel on 3 April 2003.
<p>
Digital photo by
<a href="http://www-users.rwth-aachen.de/christoph.schmitz2/index.html">Christoph
Schmitz</a>