SAN FRANCISCO — The wild parrots that call San Francisco home have become a given of city life, squawking their way to their favorite spots, delighting tourists. The famous flock is now about 300 strong, more than triple what it was 10 years ago. But that, it turns out, is good and bad news for the birds. A local bird rescue, which was founded to rescue abandoned pet cockatiels, is inundated with wild parrots who need care, from fledgings that crash and break a wing or leg to birds stricken by illness to those injured by predators or accident. Just when the rescue group, Mickaboo Companion Bird Rescue, is overwhelmed with birds of all species, including canaries, cocktails and amazons – many surrendered by owners grappling with hard times – it is also handling more and more members of the wild flock. "As a flock, it's healthy, it's growing," said Jennifer Ehrlichman, the rescue's wild conure coordinator.