This would be the best bet. Get a big pile dumped that can be used throughout the year.That's interesting. I'm going to be hosting a chainsaw party in the next couple weeks to clear out 40 or 50 trees (2 to 10 inches diameter average) so I can plant fruit trees next year. I have access to a wood chipper as well. I remember in another thread you mentioning seasoned being better, but as long as there isn't oil or detritus, fresh could work in a pinch(maybe?). There has also been a contractor cleaning up the power lines in the neighborhood lately, if I can get a dryish day to dig, getting them to come dump here shouldn't be hard to do.
What kind of chipper do you have access too?
The typical homeowner sized chipper is going to be a ton of work and generally generates smaller more uniform sized chips than a big commercial rig. You want a variety of sizes.
Aged chips are better due to possible mold blooms which can be toxic to your birds.
Branches chipped in winter would be better too as no leaves so less wet and too cold to let mold grow as prolifically.