Gilroy, CA. Since they are not obviously in distress I am skeptical what the authorities can do. In addition, they would probably disappear before anyone could assist. Bureaucracy tends to take months to years even with a severe case of abuse.
I also did a quick search for stolen macaws in the area and didn't pull anything up. Judging on the lingo these may even have been wild caught or stolen from Mexico. Not sure how they got them across the border but they probably aren't local thefts. It is even possible that they got them in a trade or gamble and didn't actually know what to do with them.
http://www.santacruzspca.org/ This appears to be the nearest SPCA.
I sent an email regarding a better perch and a helpful website regarding feeding and care and reminded them they are intelligent creatures. If people would like to email PLEASE keep it friendly or they will just cuss you out and ignore your advice.