Joel Shakespeare, head spider keeper at the Australian Reptile Park, said the spider was a Golden Orb Weaver.
“Normally they prey on large insects… it’s unusual to see one eating a bird,” he told ninemsn.com.
Mr Shakepeare said he had seen Golden Orb Weaver spiders as big as a human hand but the northern species in tropical areas were known to grow larger.
Queensland Museum identified the bird as a native finch called the Chestnut-breasted Mannikin.