I too am unable to find the sample code for this project. The link above is invalid and says 'can't be found'. I did search the developer site for Backyard Birds but the code available at https://developer.apple.com/documentation/swiftui/backyard-birds-sample appears to not include the Widget Extension needed to code along with https://developer.apple.com/wwdc23/10029 'Build widgets for the Smart Stack on Apple Watch. Any help with where to obtain the updated code would be greatly appreciated. Thanks Drew