"Mule"... This bird is an intriguing hybrid between a canary and a European goldfinch, and have been artificially bred since the Victorian era when they were famed as songbirds. They are famous for singing the best of all birdsongs and for this reason, served as cage birds back in the days. Now not as common as they were in that era, still they are bred and kept by aviculturists. These birds, like so many other hybrids, are sterile despite still being bred for captivity. mematic
SFGATE @SFGate Since mid-November, scores of songbirds have died as a result of salmonellosis, a gut disease that is quickly transmitted when they gather at bird feeders or birdbaths. Scores of songbirds are dying across the Bay Area 237 SFGATE @SFGate The CDFW said bird rescue centers in the San Francisco Bay Area, Central Coast and Sierra Nevada have been "inundated with calls" from residents who have discovered increasing numbers of sick or dead birds at their feeders.