He was educated at Woodlands School, Opotiki and Grafton School, Auckland. Prior to enlistment in the Royal New Zealand Air Force he was employed by the Portland Cement Company Limited.
Ducker applied for enlistment as an air gunner on 2 March 1940. He trained in New Zealand before going to Canada where he was awarded his Wireless Operator Air Gunner's badge and promoted to Sergeant on 25 October 1941. He was commissioned in the rank of Pilot Officer two days later and promoted to Flying Officer on 1 October 1942. He left for the United Kingdom on 19 January 1942 and arrived at No. 3 Personnel Reception Centre, Bournemouth on 7 February 1942.
His first posting on 18 March 1942 was to No. 5 Signals School for a short course before being posted to No. 13 Operational Training Unit, Bicesrey?, Oxfordshire. He completed his training on Anson and Blenheim.
On 15 July 1942 he was posted to No. 296 Squadron, Netheravon?, Wiltshire and on 11 August to No. 297 Squadron at the same station.
On 12 December 1942 Pilot Officer Ducker was wireless operator air gunner of a Whitely bomber, which took off on a bombing raid and failed to return to its base. All the members of the crew were reported missing and later information received through the International Red Cross Committee from a German source revealed that Pilot Officer Ducker had lost his life on 12 December and was buried in the English World War Military Cemetery, Abbeville-Somme. In total he flew 160 hours as Wireless Operator Air Gunner.
His medals with ribbons were sent to his mother, Mrs A.G. Pocock, View Road, Glen Eden, Auckland.
Six men who had been at school together in Portland, Whangarei joined the air force and trained in Canada. Charles Frederick Clarke (630828 NZ4310553), one of two surviving members of this group, attended a Portland Primary School reunion in November 1998 and researched details of this group with the intention of contributing a brick for the new memorial being constructed at Winnipeg in Canada to commemorate those who trained in Canada during World War 2. The name, date of birth, place of origin and date of death was to be inscribed on each brick. The Royal New Zealand Air Force crew members that Charles Frederick Clarke (630828 NZ4310553) is commemorating in this way are: Aubrey John Clarke (NZ429177) his brother; D'Arcy Clive Melville Ducker (NZ411749), Desmond Charles Holland (NZ427478), Douglas Jack McLean (NZ414654) and Raymond Anthony Lindsay (NZ392047).
Auckland Museum Armoury Resource Centre, Vertical File - An article in the North Shore Advertiser 15 July 1999 which gives details about the money raised for New Zealand's contribution to the memorial building fund in Winnipeg, the opening ceremony and the role of Flight Lieutenant Bill Phillips and the president of the North Shore Brevet Club, Graeme Gemmell, in the project.
Four brothers went to WWII; Neville Frank Ducker (47600), Leslie Herbert Ducker (3113), D'Arcy Clive Melville Ducker (NZ411749) and Douglas Norman Ducker (434171). Their father Frank Ducker (16620) served in WWI. AWMM