Relationship between blood lead concentrations in common ravens and date in 2011 and 2012.
Dot size is proportional to the log of the sample size. Error bars represents SE. Dotted lines represent the 95%CI. The light blue barplot illustrates the cumulative number of rifle-shot moose in the hunting area selected for the study. Ravens with no sign of clinical contamination were reported to have lead concentration &lt;100 µg.L−1 (horizontal red dashed line) according to  Craighead D, Bedrosian B (2008) Blood lead levels of Common Ravens with access to big-game offal. Journal of Wildlife Management 72: 240–245.
Frédérick Lelievre, Junior A. Tremblay, Charles Maisonneuve, Richard Saint-Louis, Joël Bêty Pierre Legagneux , Pauline Suffice, Jean-Sébastien Messier,
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<p>Arcticle : "High Risk of Lead Contamination for Scavengers in an Area with High Moose Hunting Success" ; in PLOS ;  Published: November 12, 2014 -  <a rel="nofollow" class="external free" href="https://doi.org/10.1371/journal.pone.0111546">https://doi.org/10.1371/journal.pone.0111546</a>
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