Some people make a simple bow net using fish net small enough to keep sparrows and such from getting out. Then they put out seed in the garden by the net and wait until a good number are there and then trigger the net. Not that hard to do and you can get a bunch of live birds quickly. Just let them get used to the net being open and the free seed...a few days of that is all it would take.
You can also make a simple funnel trap out of wire fabric. Just taper down from the outside to something small enough on the inside to where they can't get back out easily. Put plenty of seed around it and inside the funnel and inside the trap and just let it do it its thing. Sometimes is useful to put a small dish of water inside and perhaps something over part of it that would create some shade so they don't cook before you get back to them. Sometimes you can use some fresh branches from a bush for this, or place the trap under a bush where there is usually shade.