First them Treecreepers - well our most famous creepy is not even in MacK - Sichuan Treecreeper.
This guy was split from Eurasian in 1995 - its pretty much identical, but has a shorter bill and the buffish brown tinge to belly that contrasts with white chin - but to see these ID marks in the field is very difficult - far easier in my pic.
The real give-away with Sichuan is its call - which can be described as longish descending trill - you can download a couple of examples at Xeno Canto.
This bird is quite common in areas of high natural forest (Wawu is the place to hear and see them) - it must also occur in Yunnan, since we've seen it at a spot just on the border (forests around Muli) - but to make things complicated we've also had Eurasian Treecreeper come when playing Sichuan Treecreeper calls - responding with the Eurasian call.
So them we have our mysterious Hodgson's Treecreeper - this split doesn't seem to be acknowledged by OBC - but there's a section on it in Wikipedia -
http://en.wikipedia.org/wiki/Hodgson%27s_Treecreeper
In that article they mention a so-called - Certhia hodgsoni khamensis - or Kham Treecreeper. The Kham is the eastern part of the Tibetan Plateau - that's mainly within Sichuan.
The the other Treecreeper we have left is Eurasian - we have pics of this bird scattered through our discs - Ill have to pay more attention to them to see if I can pick up any of the Hogsoni characteristics.
As for Magpies - the only place, in Sichuan, where we've commonly seen Azure-winged - is around the Ruo Er Gai area - in north Sichuan. These birds are a lot cleaner than some of super scruffy examples I've seen in Beijing!!!!!
We get a few Black-billed Magpie in the Sichuan Basin - we sometimes see them in Chengdu - but up on the plateau they're very common - and can be see scavenging around almost any site of human rubbish.
Red-billed Blue Magpies stick in areas with more forest/tree cover - I've see them on the outskirts of Chengdu - at the Botanical Gardens - but you have to go out of town and climb a little before you get into this bird. They can be thankful for that long tail - it makes them an impractical bird for housing in traditional Chinese bird cages - Eurasian Jay isn't so lucky and is commonly seen in cages around here. In a general throughout Sichuan basis- red-billed Blue is the most Commonly see magpie in Sichuan
But the real gem of Sichuan Magpies should be the Indochinese Green Magpie - MacK talks about this bird being present within the Mabian area of Sichuan - that's right in the middle of Yi minority country. Yi areas can be very poverty stricken - often there's been a lot deforestation - you always have to be a little cautious in these places, and try not to travel at night.