The Bullock's oriole is a colorful member of the Icteridae, blackbird, family found in the western half of North America. The Bullock's oriole was named after William Bullock who was an English born collector and amateur naturalist. On a trip to Mexico he shot a Bullock's oriole and brought it back to professional naturalist and birder William Swainson who named the species after Bullock.
For a while the Bullock's oriole and the Baltimore oriole were combined into a single species called the northern oriole. This was primarily due to the fact that the two species do hybridize with one and other where their ranges over lap in the central portion of North America. However DNA testing revealed that the two species are not very similar so they were broken back up into two separate species.