What is the name of the oldest known fossil bird, and approximately how many years ago did it live? Please provide both the bird's name and its approximate age.
Navigate to a search engine (e.g., DuckDuckGo or Google). Search for 'earliest known fossil bird'. Locate a reliable search result snippet or webpage that provides the name of the bird and its approximate age. Extract the name of the bird and its approximate age.
The earliest known fossil bird is identified as 'Archaeopteryx'. The approximate age is stated as '150 million years ago'.