Kashyapa married Daksha’s daughter Tamra. They had five daughters – Kraunchi, Bhasi, Shweni, Dhritarashtri, Shuki. Kraunchi gave birth to owls, Bhasi to Bhasas, Shweni to eagles and vultures, Dhritarashtri to swans, kokas etc, and Shuki to Shukas, as per Ramayana Aranyakanda Sarga 14.