Is milkweed a suitable food for birds why?

No, milkweed is not a suitable food for birds. While some bird species may occasionally consume milkweed seeds, the plant's sap and leaves contain toxic cardiac glycosides that can cause serious health problems in birds. Ingestion of milkweed can lead to symptoms such as vomiting, diarrhea, heart problems, and even death in severe cases. Therefore, it is not advisable to offer milkweed to birds as food.