Here are the data on the annual winter capture of Yellowstone Park wolves.

While the weight data of 2 packs is missing, but just two of these giant “canadian wolves” that were measured topped 100 pounds.

Wolf # Date of Capture Pack Sex Pelt Color Age Class Weight pounds
209F 01/30/07 LEOPOLD FEMALE BLACK ADULT 88
383M 01/30 AGATE CREEK MALE GRAY ADULT 101
470F 01/29 OXBOW CREEK FEMALE BLACK ADULT 77
527F 12/31/06 SLOUGH CREEK FEMALE BLACK ADULT 86
569F 12/31 DRUID PEAK FEMALE GRAY ADULT 88
570M 12/31 DRUID PEAK MALE GRAY PUP 86
571F. 12/31 DRUID PEAK FEMALE GRAY PUP 80
572F 01/01/07 YELLOWSTONE DELTA FEMALE BLACK ADULT
573M 01/01 YELLOWSTONE DELTA MALE GRAY PUP
574F 01/01 YELLOWSTONE DELTA FEMALE BLACK PUP
575F 01/01 YELLOWSTONE DELTA FEMALE GRAY ADULT
576F 01/01 YELLOWSTONE DELTA FEMALE GRAY ADULT
577M 01/05/07 GIBBON MEADOWS MALE GRAY PUP 88
578F 01/05/07 GIBBON MEADOWS FEMALE BLACK PUP 81
586M 01/29/07 MOLLIE’S MALE GRAY ADULT
587M 01/29 MOLLIE’S MALE GRAY ADULT
588F 01/29 OXBOW CREEK FEMALE BLACK PUP 88
589F 01/29 OXBOW CREEK FEMALE GRAY PUP 90
590M 01/30 AGATE CREEK MALE BLACK PUP 110
591F 01/30/07 LEOPOLD FEMALE GRAY PUP 73
592F 01/30 LEOPOLD FEMALE GRAY ADULT 88
593F 01/30 LEOPOLD FEMALE GRAY PUP 77

Added May 14. Past years’ capture data.

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About The Author

Ralph Maughan

Dr. Ralph Maughan is professor emeritus of political science at Idaho State University with specialties in natural resource politics, public opinion, interest groups, political parties, voting and elections. Aside from academic publications, he is author or co-author of three hiking/backpacking guides, and he is President of the Western Watersheds Project.

7 Responses to Latest Yellowstone wolf capture data

  1. avatar Layton says:

    Oh c’mon Ralph,

    Surely you can do better than this when trying to shoot down the “Canadian” wolf thing!!

    There are only three males listed WITH weights, one adult — 101 pounds, two pups — one at 86 and the other at 110 (wow, he’s a whopper). Isn’t it rather convenient that the other males don’t have weights listed?? Now if I was some kind of a conspiracy theorist, I just MIGHT find that suspicious. ;^)

    Layton

  2. Layton,

    I anticipated someone like you would ask this very question, so today I’ll put a link to past years’ data. I guess you never read my old web page and the capture data posted there.

    Thanks for highlighting the post.

  3. avatar Bill_Kaiser says:

    Wow! 110lb pup? Those agates must be eating well. 🙂

  4. I had been told that by 10 months most pups were 90% of their adult weight, but several month later a wolf biologist posted as said “no, they can still grow a lot.”

    I wish this contradiction had been followed up.

    It’s ironic that the largest wolf captured was a pup. I probably need to follow up and see if they made an error.

  5. avatar JEFF E says:

    One thing that plays into wolf weight is that they will gorge, sometimes 20 or more pounds at a sitting. Reasons are varied, they will go somewhere and cache food, take food back to a den site for the pups and bitch, or because a pack can go days between kills they will just gorge as a survival mechanism. I am not saying that is the case with this pup, he just maybe just the next Shaquille O’Neill of wolves.

  6. avatar JEFF E says:

    …in the early seventies I had the privilege of spending some time with a 8 month old c.l.Arctos that weighed in at 90 lbs. Imagine trying to feed that kid. :*)

  7. avatar Neleh says:

    Thanks so much for the very detailed information on the weights of Yellowstone’s wolves. I am very interested in the size ranges of wolves and other wild dogs so find these yearly weight records of great interest. I am looking forward to the winter 2007/2008 weight records.

    Keep up the good work and well done for creating such a great site, Ralph!

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