clamp connection

looks like Amanita muscaria

what state?

Oysters will be on trees or downed logs. I've never seen (or heard of) them on buried wood, and this doesn't appear to be buried wood anyway.

Turkey tail Trametes versicolor

Many (definitely not all) images I've seen of them show scaly caps, including in guide books.

It sure looks like it but I haven't seen a lot myself and have zero knowledge of UK fungi...

Sorry, that was a pretty long walk. 🤪 Yah, the S. americanus in my yard do have large pores, at least in old age.

I don't remember chicken fats having such enlarged tubes...I guess I'll walk out in the yard and check because I tend to ignore them.

muscaria

You could train your dog not to eat them, if they are showing any signs of doing so.

3 different people posted on this thread between Oct 12-22 and all of their profiles say "0 posts". Weird. Maybe you have to have 2 posts before the software can count them.... Anyway...I've never tried maitake

I'm not sure if the taxonomy of blue oysters, Pleurotus columbinus, is settled (I've also seen it described as a subspecies or variety of P. ostreatus), but this map shows an occurrence in Veracruz Mexico and Mauritius. My understanding was that its a European taxon. So I'm not sure these represent introductions but I'm throwing it out there as possible https://www.discoverlife.org/mp/20m?kind=Pleurotus+columbinus

Why do several profiles on this thread and elsewhere say "0 posts" when they clearly have posted?

the Pleasing Fungus Beetles refers to the entire family Erotylidae, which includes some 80 species in North America. Most of them are pretty drab and I can't think of any black and yellow ones offhand (I don't know all of them), but you might also be thinking of a common sap beetle, family Nitudulidae, such as Glischrochilus fasciatus, which can be orange/black or yellow/black. https://bugguide.net/node/view/245792/bgimage I've never seen them on oysters myself, but they can certainly be found on the same trees.

I often find those beetles on Pleurotus in the Midwest. Their name escapes me right now but it will bother me until I ....ahhh, got it. The genus is Triplax, probably Triplax thoracica, and they are in the family Erotylidae aka "pleasing fungus beetles".