A Whale of a Feast Bears Many Scavengers But No Bears

August 24, 2016 Posted by: Tania Lewis

An adult humpback whale was found floating dead in Icy Strait on June 26, 2016 and towed to a nearby beach in Glacier Bay National Park (https://www.nps.gov/glba/learn/news/dead-humpback-whale-found-afloat-near-point-carolus.htm).Park biologists placed a camera near the carcass that has collected time-lapse and motion sensor activated images for almost two months.Eagles, ravens, gulls and wolves have frequented the carcass for the duration of monitoring. 

Surprisingly, no bears have been detected!These results are in stark contrast to observations made on a humpback whale carcass near Scidmore Cut in the west arm of Glacier Bay in the summer of 2010, during which brown bears were detected at the carcass every day for four months (https://www.nps.gov/glba/learn/nature/blubber-bonanza.htm;Lewis and Lafferty 2014, Ursus 25:8-13).One possible reason is that the current whale carcass is located in an area surrounded by old growth forest with abundant salmon and berry resources, whereas the Scidmore Cut area was recently de-glaciated and much of the uplands still covered in ice.It is likely that a whale carcass is more important to bears in areas where other food resources are limited.Biologists will continue monitoring to see if black or brown bears ever show up at the current carcass, which is rapidly dwindling as birds and wolves continue their whale of a feast.

eagles at whale carcass

Caption: Bald Eagles were the first to begin feasting on the humpback whale carcass on June 30.  


eagles, whale
Caption: Bald Eagles depart their feast as wolves approach on July 6.

wolves and whale carcass

Caption: Wolves scavenge the carcass and survey the scene on July 6.


wolf with whale blubber

Caption: One wolf drags away a tasty "morsel" on July 9.


wolves eating whale carcass

Caption: Wolves continue to scavenge remains of the carcass on July 30.


wolves, ravens, skeleton

Caption: After about a month eagles visited the carcass less frequently but ravens became more common, while wolves continue to visit the carcass.Photo taken August 6th.


gulls on whale carcass

Caption: Gull numbers have also increased as eagle numbers decreased.Photo taken August 7th.


raven

Caption: Ravens are very curious about the camera and seem to especially enjoy taking selfies. Photo taken August 17th.


whale skeleton on beach

Caption: By August 22nd, after nearly two months on the beach, most of the flesh of the carcass is gone and only tough smelly blubber and bones remain.

 

 

 







4 Comments Comments icon

  1. Michelle & Satchel
    June 28, 2018 at 01:57
     

    What an amazing series of photos!

     
  2. August 30, 2016 at 01:48
     

    Fascinating to watch to the process of a whale's contribution to the ecosystem. I'm surprised that bears did not arrive at the scene.

     
  3. August 30, 2016 at 01:48
     

    Fascinating to watch to the process of a whale's contribution to the ecosystem. I'm surprised that bears did not arrive at the scene.

     
  4. August 30, 2016 at 12:10
     

    It seems so odd that the "aromas" didn't draw bears. Is the speculation that there were better alternatves (salmon). Surely a wolf pack wouldn't dissuade hungry bears from having their way.

     
 
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Last updated: August 24, 2016

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