The following books and reports are some that I have found useful in order to learn about the birds in Holywells Park both in a historical context and up to present day.
The Birds of Suffolk by W H Payn 2nd edition, published by Ancient House Publishing,
The Birds of Suffolk by Steve Piotrowski, published by Helm,
Suffolk Bird Reports (1980- 2007) published by the Suffolk Naturalists Society in collaboration with the Suffolk Ornithologists Group (SOG)
The Harrier- Suffolk Ornithologists Group (SOG) quarterly bulletinBirds at Holywells by Ray Waters published by Ipswich Borough Council
The Wood Duck and the Mandarin by Lawton L Shurleff and Christopher Savage

Above- Grey Heron, Holywells Park, 25 October 2009, photo by Parrish Colman