Pseudostigmatidae
...that the "helicopter" damselflies of family Pseudostigmatidae specialize in plucking spiders from their webs?
...that the "helicopter" <a class="mw-redirect" href="./Damselflies" id="mwBCg" rel="mw:WikiLink" title="Damselflies">damselflies</a> of family <b id="mwBCk"><a href="./Pseudostigmatidae" id="mwBCo" rel="mw:WikiLink" title="Pseudostigmatidae">Pseudostigmatidae</a></b> specialize in plucking <a href="./Spider" id="mwBCs" rel="mw:WikiLink" title="Spider">spiders</a> from their <a href="./Spider_web" id="mwBCw" rel="mw:WikiLink" title="Spider web">webs</a>?