An aviation obstruction marker on a high-voltage overhead transmission line, near Lyncrest Airport, Winnipeg Canada. The marker reminds pilots of the presence of an overhead line which would otherwise be difficult to see.
<a href="//commons.wikimedia.org/wiki/User:Wtshymanski" title="User:Wtshymanski">Wtshymanski</a>
<span class="int-own-work" lang="en">Own work</span>