otiation</code></dt>
<dd><p>a numeric vector</p></dd>

    <dt><code>BroodSize</code></dt>
<dd><p>brood size</p></dd>

    <dt><code>NegPerChick</code></dt>
<dd><p>number of negotations per chick</p></dd>

  
</dl></div>
    <div id="source">
    <h2>Source</h2>
    <p>Roulin, A. and L. Bersier (2007)
  Nestling barn owls beg more intensely in the presence of their mother
  than in the presence of their father.
  <em>Animal Behaviour</em> <b>74</b> 1099--1106.
  <a href="https://doi.org/10.1016/j.anbehav.20