This is what Killdeer do when you get near their nest that they build in stones. They act as if their wing is broken so their prey comes after them and leaves the babies alone.
<a rel="nofollow" class="external text" href="https://www.flickr.com/people/98799884@N00">Audrey</a> from Central Pennsylvania, USA
CC BY 2.0
<a rel="nofollow" class="external text" href="https://www.flickr.com/photos/98799884@N00/3567167561/">Mother Killdeer</a>