Tim Sparks

Should avian egg size increase as a result of global warming? A case study using the red-backed shrike (Lanius collurio)

T. Sparks, P. Tryjanowski, S. Kuźniak, 2004, Journal of Ornithology.

How consistent are trends in arrival (and departure) dates of migrant birds in the UK?

T. Sparks, C. Mason, P. Tryjanowski, 2007, Journal of Ornithology.

What affects the magnitude of change in first arrival dates of migrant birds?

T. Sparks, P. Tryjanowski, S. Kuźniak, 2005, Journal of Ornithology.