Our siskins are generally tame. I can approach within a few feet of the feeders before they flee. And they don't seem to react at all to my calling the cat, whereas the jays and squirrels run like heck.
Two days ago (3 June) I heard what I thought was siskin calls near our feader and yesterday two landed on our feeder while at least one more was in a nearby tree. One at the feeder was extremely tame allowing approach within a few feet. Seemed like possible fledgling, but that's only a guess. I haven't heard/seen any other siskins since winter incursion. If they nested in the area, it wasn't very close.