What bird (?) is making this sound in YNP (Hetch Hetchy)

[genetastic]

I’ve heard this sound every time I’ve hiked over Moraine Ridge in Hetch Hetchy (Jack Main trail). It sounds like someone blowing over the top of a bottle, low and thrumming. I’m assuming it’s a bird of some sort, but it always seems to be coming from someplace that I can’t see.

Does anyone have any idea what this is?

[rlown]

[genetastic]

Thanks! Looks like that bird is also known as the Sooty Grouse: https://ebird.org/species/soogro1

[bobby49]

Now we need some Sooty Grouse recipes.

[rlown]

Butter, sage and a skillet. Salt and pepper as needed. the plucking is the hard part.

[bobby49]

Is that broad leaf sage or narrow leaf sage?

[rlown]

If you have to ask, you don't know how to cook.

[oldranger]

Damn why do they insist on changing names? In my day they were Blue Grouse. Once when camped at Seville lake I tracked the sound about a half mile up the hill to the sw. Finally spotted it up in a tree. Every year at roaring river there would be a mother grouse with about 6 chicks in the small meadow adjacent to the station. By the end of the season there would be one or two.

[rlown]

Still Blue Grouse in my take. Hard to hit with a .22 as I evidently suck. Glad I drilled out my stock and put 12 more .22's in the stock butt.