Oh thanks and sorry- this one was a bit random but i couldn't resist picking those leaves. The leave are now soaking and are giving off a yellow colour dye.
Oh thank you and thanks for your patience. Yes I'm going to join your Monday weeding group. I"m off on an artist residency soon so plan to join the weed group from April. There's so much to learn!
Service tree, Sorbus domestica, is listed in Field Maps so can be reported there. It is not common and has low priority on the ACT list of naturalised alien plants.
I can't say from the photos which species; probably not a local Eucalyptus. Decades ago several Eucalyptus species that are not local were planted around the Hackett water tank, I think in order to test which one is suitable to re-timber Mt Majura which has been cleared for sheep and cattle farming and timber collection. At that time it seems that there wasn't a concern whether species was local or not. The branch could have been fallen / blown from any of those planted not local trees. To see Mt Majura's local trees visit https://www.flickr.com/photos/61627737@N03/albums/72157627244893256/
Einadia nutans subsp. nutans, Climbing Saltbush, a local native perennial; leaves may wilt and disappear in summer, it will resprout from woody roots when conditions are suitable. hackettganggang you should join our walks and work parties to learn more about local and introduced plants :-)