Correlation between the laying date of Northern Lapwing Vanellus vanellus and average spring temperature in The Netherlands
<a href="https://en.wikipedia.org/wiki/nl:User:Jan_Arkesteijn" class="extiw" title="w:nl:User:Jan Arkesteijn">Jan Arkesteijn</a> at <a href="https://en.wikipedia.org/wiki/nl:" class="extiw" title="w:nl:">Dutch Wikipedia</a>
2007-06-23
<span class="int-own-work" lang="en">Own work</span>