I would be glad to send you a long simplified explanation on black cumin also known as nigella sativa, haba barakah, gizhah and kalonji. No we do not feed them to birds. This miracle remedy has been used for over 2000 years and was found in King Tut's tomb as a blessed seed. The reason we value this seed so much is because it is a remedy given to us by our most beloved prophet. It is a cure for all disease except death.
I will write more in my email later on this evening.