what you heard might be Elks hawling.
We heard them many places in the Park even not seeing them, but when we saw a big herd at Mommoth Spring, we can confirm what we heard all along is from Elk, not wolf.
We had a good video clip of a cyote at West Thumb - we were so exciting at first thought we saw a wolf but the size of it was too small for a wolf. But we captured how he played and chewed a tree branch.
We heard them many places in the Park even not seeing them, but when we saw a big herd at Mommoth Spring, we can confirm what we heard all along is from Elk, not wolf.
We had a good video clip of a cyote at West Thumb - we were so exciting at first thought we saw a wolf but the size of it was too small for a wolf. But we captured how he played and chewed a tree branch.