Decline of UK urban House Sparrow population: PhD thesis by Kate Vincent
Data were collected during 2001-2003 from 9 study areas spread along the urbanisation gradient. Most sparrows in most study areas nested in or close to domestic gardens. Counts of territorial males declined by 28% between 2001 and 2003, with the largest declines in rural villages (25%) and suburban fringe (16%) and a small increase (4%) in the urban centre. Stable isotope ratios of nitrogen ( d. N scores differed markedly between the vegetable (2.7), herbivorous invertebrate (4.7-6.4) and car...N scores ...
Kate Vincent research summary: decline in urban House Sparrow population
To establish why a species that historically has been so common is now dramatically declining in some urban areas of the UK, through quantifying important demographic parameters such as productivity and survival across urban, suburban and rural habitats. I also investigated foraging habitat selection by adults, chick diet, factors affecting chick condition and nesting success and over-winter survival to gain an insight into why urban House Sparrows might be declining. Lack of seed food during the winter.