Aside from minor issues with the beak and hands, works well at a weight of 1. The trigger phrase is "DAL employee", for best results also include "dodo", "avian", and "yellow face" in the prompt.
For the negative prompt, "feather hands" greatly helps with hand generation, and "multiple nostrils" and "beard" help a bit with the beak.
To generate Wilbur, add the phrase "aviator sunglasses", to generate Orville, put "sunglasses" in negative.
If you're having trouble with your generations, refer to the prompts in my example images. Trained on "fluffyrock-576-704-832-960-1088-lion-low-lr-e27". Sample images were generated with Easyfluff, DPM++ SDE Karras sampler.