David Lack

Lack was born in London, the oldest of four children of Harry Lambert Lack MD FRCS, who later became President of the British Medical Association.[6] The name 'Lack' is derived from 'Lock'. His father grew up in a farming family from Norfolk and became a leading ear, nose and throat surgeon at the London Hospital. Although his father had some interest in birds as a boy it does not appear that he influenced David's interest. His mother Kathleen was the daughter of Lt. Col. McNeil Rind of the Indian army. Kathleen's father was Scottish and on her mother's side was part Irish, Greek and Georgian.[2] Kathleen had been an actor and was a supporter of women's suffrage. At home they organized meetings of the poetry society. David was schooled at home until seven and then went to the Open Air School in Regent's Park before going to The Hall, Hampstead followed by Foster's School, Stubbington and Gresham's School, Holt, Norfolk. Lack was taught biology at Gresham's by W.H. Foy and G.H. Lockett.[7] He went to Magdalene College, Cambridge and received a BA second class in 1933 after studying botany, zoology and geology for part I of the Tripos and zoology for part II.[8][9]

Until the age of fifteen, Lack lived in a large house in Devonshire Place, London. The family spent their summers in New Romney Kent where Lack became familiar with the local birds especially on Romney Marsh.[10] By the age of nine, he had learnt the names of most birds and had written out an alphabetically arranged life-list.[2] In 1926, Lack won the Holland-Martin Natural History Prize for an essay on "Three Birds of Kelling Heath".[11] In 1928, with an essay on 'My favourite birds' he was the national winner of the senior prize (a silver medal) in the Public School Essay Competition, organised by the Royal Society for the Protection of Birds.[12] David did not wish to follow his father's profession in medicine and took an interest in zoology. His father then considered entomology which was then the only professional field in zoology and found work for David at the Frankfurt museum in the summer of 1929. He spent four months pinning insects in the Senckenberg Museum and fount it “extremely” boring.[13] He joined the Cambridge Ornithological Club whose members included Peter Scott, Arthur Duncan, Dominic Serventy, and Tom Harrisson. His first scientific paper was on the display of nightjars, published in the Ibis in 1932. He joined on several expeditions with Cambridge researchers including two to the Arctic.[14] Lack wrote The Birds of Cambridgeshire (1934) which was published by the Cambridge Bird Club. In this work, he departed from the contemporary style with a distinct de-emphasis on rare and accidental birds.[15]

Lack received an Sc.D. from Cambridge University in 1948.[16]

After Cambridge, Lack, on the recommendation of Julian Huxley took up a position as a science mentor at Dartington Hall School,[17] Devonshire from 1934 until Summer 1938 when he took a year off to study bird behaviour on the Galapagos Islands. In 1935 he made his first trip to the United States as a chaperone for a Dartington Hall student returning to California. Here he met Joseph Grinnell and Robert McCabe and gave a talk at the Cooper Ornithological Club. In New York, he met Ernst Mayr at the American Museum of Natural History. He returned via the SS Bremen, only one of about four English speakers on the German ship.[18] He was only in the Galapagos for part of that year, starting August 1938. With the data that he collected in the Galapagos, especially on the finches he went to the United States. April to August 1939 was spent at the California Academy of Sciences which held a large collection of the finches of Galapagos that had been studied earlier by Harry Swarth and at Ernst Mayr's home in New Jersey. While in the US he made a study of the tricoloured blackbird with John T. Emlen.[19] He returned home in September 1939, after the outbreak of war.[20] Lack published The Galapagos Finches (Geospizinae), A Study in Variation in which he examined variations within species across islands and considered that many of them were non-adaptive and due to founder effect and genetic drift.[21] Lack's first major work was The Life of the Robin, which was based on four years of field work that he conducted while teaching at Dartington Hall School. He examined robin behaviour, song, territory, pairing and breeding using ringing to mark and track individual birds.[22] The manuscript was completed in 1942 and it went through five editions from 1943 to 1970. One of Lack's students at Dartington Hall was Eva Ibbotson. A colleague who helped in filming some of the robins for Lack was the geography teacher Bill Hunter. In 1934 Lack went to Tanganyika on an invitation from R.E. Moreau.[23]

The Common Swift, one of many subjects studied by Lack.

Lack was committed to pacificism and debated the philosophy even during his Dartington days with the founder of the college, Leonard Knight Elmhirst. During World War II Lack however served with a British Army unit called the Army Operational Research Group on the Orkney Islands working on radar use. During this work he met other biologists who had been inducted into the war including George Varley, an entomologist who introduced him to the idea of density-dependent regulation of animal populations.[24] Lack's observations on spurious echoes produced by birds would later allow him to establish the field of radar ornithology to study bird migration.[25][26] Lack was released from wartime duty in August 1945 so as to take a position to as Director (succeeding W.B. Alexander) of the Edward Grey Institute of Field Ornithology at Oxford University, a position that he held until his death in 1973.

Lack's work in ornithology was almost entirely based on studies of the living bird. He was one of the pioneers of life-history studies in Britain, especially those based on quantitative approaches, when some traditional ornithologists of the time were focussing their studies on morphology and geographic distribution.[27] Lack's major scientific research included work on population biology and density dependent regulation. His work suggested that natural selection favoured clutch sizes that ensured the greatest number of surviving young. This interpretation was however debated by V.C. Wynne-Edwards who suggested that clutch size was density-independent. This was one of the earliest debates on group selection. Lack's studies were based on nidicolous birds and some recent studies have suggested that his findings may not hold for other groups such as seabirds.[28]

As a mentor for numerous doctoral students, Lack followed a hands-off method, letting students decide their own research topics. He encouraged students to sort out their ideas and find the "simplest explanation, which was probably best." He would make students work on their papers and give only one reading to their thesis asking them to choose either a draft or a final version to submit.[29]

He wrote numerous papers in ornithological journals, and had a knack of choosing memorable titles: he once claimed to have single-handedly caused the renaming of a group of birds through the submission of a scientific paper with the title "Territory and Polygamy in a Bishop". This 1935 publication was subsequently titled "Territory and polygamy in a bishop bird, Euplectes hordeacea hordeacea (Linn.)" in the journal Ibis as the journal editor felt that the title might cause misunderstanding.[30]

• 1951: elected Fellow of the Royal Society (FRS) in 1951[2]
• 1958: receives Godman-Salvin Medal of the British Ornithologists' Union
• 1962–1966: President, International Ornithological Congress
• 1964–1965: President, British Ecological Society
• 1972: Awarded the Darwin Medal of the Royal Society[41]

The centenary of Lack's birth, 16 July 2010, was marked by a 'David Lack Centenary Symposium', hosted by the Edward Grey Institute. A programme of talks focused on and celebrated the scientific contributions of Lack to ornithology, and the broader fields of ecology and evolution, and assessed the development of these fields in the 21st century.[42]

David Lack married Elizabeth Lack (née Silva) who was also an ornithologist. Elizabeth Silva was born in Hertfordshire in 1916 and took an early interest in music. She wished to joined the Royal Academy of Music in London but the war led to her serving in the Auxiliary Territorial Service as an ambulance driver in Europe. After the war she applied for work and due to her interest in birds she sent her resume to Richard Fitter who passed it on to David Lack with a note "Here's another for your reject file." Lack however interviewed her and appointed her as a secretary. Noting her interest in birds, he also invited her to serve as a field assistant for studies in the Wytham Woods. She also helped in the study of swifts. One day Elizabeth did not return to her office after her observations of the swifts and David, worried that she might have fallen off a ladder, found her engrossed in observation. They became engaged in 1948 and were married on July 9, 1949. The best man was George Varley.[43] They had four children: Peter Lack (born 1952, a biologist), Andrew Lack (born 1953, also a biologist and academic), Paul Lack (born 1957, a freelance teacher), and Catherine Lack (born 1959, a university chaplain).[4] In Oxford, the Lacks initially lived in a flat in Park Town, Oxford, and later on Boars Hill, just south of Oxford. Lack enjoyed music and was also a fan of field hockey and tennis in which he also participated.[44] Lack died from non-Hodgkin's lymphoma despite radiation treatments.[45]

• Anderson, Ted R. (2013). The Life of David Lack. Oxford University Press. ISBN 978-0-19-992264-2.