Comparing the number of fur reported by  trappers to the counter of Hudson Bay (series of about 90 years) for Lynx canadensis | Canad lynx  and <a href="https://en.wikipedia.org/wiki/Lepus_americanus" class="extiw" title="w:Lepus americanus"> American hare</a>. This graph shows that the two species have cyclic population dynamics. Source: according to statistics collected by Odum archives (published 1953)
<a href="//commons.wikimedia.org/wiki/User:Lamiot" title="User:Lamiot">Lamiot</a>
CC BY-SA 4.0
<span class="int-own-work" lang="en">Own work</span> based on <a rel="nofollow" class="external text" href="https://books.google.co.in/books?id=FuIv845q3QUC&amp;pg=PA16#v=onepage&amp;q&amp;f=false">Pilovsky et al.</a> 2001 (p. 16, figure 1.13)