Happy New Year, and thanks so much for reaching out! I hope you'll be able to connect with Bustard relatives and connections here. :)
I have collected some information about this surname which I hope will come in handy as well.
The name Bustard is of Anglo-Saxon origin. It was named for the 'bustard', a large bird once common in medieval England. The surname Bustard was first found in Devon where they held a family seat from very ancient times, some say well before the Norman Conquest and the arrival of Duke William at Hastings in 1066 A.D.
Bustard households in mid-nineteenth century Ireland were mostly found in the northern parts of the island, and you can find a handy overview on the Griffith's Valuation
I also found some information about the Bustards in County Donegal on the Genealogy website
which might be interesting.
We're always here if you have any questions or could use some help with your research, so please don't hesitate to reach out if you need anything. :)