Birds and aircraft: A problem on some New Zealand airfields

[First paragraphs...]
Since technology enables man to assert at least some control over most features of his environment it is surprising that in the planning of engineering projects the only features considered seriously are physical ones. Biological complications are often ignored until they become a problem and in this the aviation industry is no exception.
Recent advances in aircraft design and corresponding increases in air-speed have. along with increases in the population of some birds, particularly gulls, emphasised a problem, always apparent but not previously considered important: that of the risk of collision between birds and aircraft.