Article first published in Avicultural Magazine Volume 101, No: 1, 1995 Reproduced here by kind permission of the Avicultural Society & the Author

Article first published in Avicultural Magazine Volume 101, No: 1, 1995 Reproduced here by kind permission of the Avicultural Society & the Author

Article first published in Avicultural Magazine Volume 101, No: 1, 1995 Reproduced here by kind permission of the Avicultural Society & the Author

Article first published in Avicultural Magazine Volume 101, No: 1, 1995 Reproduced here by kind permission of the Avicultural Society & the Author

Article first published in Avicultural Magazine Volume 101, No: 1, 1995 Reproduced here by kind permission of the Avicultural Society & the Author

Article first published in Avicultural Magazine Volume 101, No: 1, 1995 Reproduced here by kind permission of the Avicultural Society & the Author

Article first published in Avicultural Magazine Volume 101, No: 1, 1995 Reproduced here by kind permission of the Avicultural Society & the Author

Article first published in Avicultural Magazine Volume 101, No: 1, 1995 Reproduced here by kind permission of the Avicultural Society & the Author

Article first published in Avicultural Magazine Volume 101, No: 1, 1995 Reproduced here by kind permission of the Avicultural Society & the Author

Article first published in Avicultural Magazine Volume 101, No: 1, 1995 Reproduced here by kind permission of the Avicultural Society & the Author