Beebee, T.J.C. (1995) Amphibian breeding and climate. Nature 374: 219–220.
Crick, H.Q.P. and Baillie, S.R. (1996) A review of the BTO's Nest Record Scheme. Thetford, U.K.: British Trust for Ornithology.
Crick, H.Q.P, Dudley, C., Glue, D.E. and Thomson, D.L. (1997) UK birds are laying eggs earlier. Nature 388: 526.
Davis, A.J., Jenkinson, L.S., Lawton, J.H., Shorrocks, B. and Wood, S. (1998) Making mistakes when predicting shifts in species range in response to global warming. Nature 391: 783–786.
Fitter, A.H., Fitter, R.S.R., Harris, I.T.B. and Williamson, M.H. (1995) Relationships between first flowering date and temperature in the flora of a locality in central England. Functional Ecol. 9: 55–60.
Hameed, S. (1994) Variation of spring climate in lower-middle Yangtse River Valley and its relation with solar-cycle length. Geophys. Res. Lett. 21: 2693–2696.
Huin, N. and Sparks, T.H. (1998) Arrival and progression of the swallow Hirundo rustica through Britain. Bird Study 45: 361–370.
IPCC (1996) Climate change 1995: the science of climate change. Cambridge, U.K.: Cambridge University Press.
Lauscher, F. (1978) Neue Analysen ältester und neuerer phänologischer Reihen. Arch. Meteorol. Geophysik Bioklimatol. B 28: 373–385.
Mason, C.F. (1995) Longterm trends in the arrival dates of spring migrants. Bird Study 42: 182–189.
McCleery, R.H. and Perrins, C.M. (1998) Temperature and egg-laying trends. Nature 391: 30–31.
Oldham, C. (1937) Migratory birds in Hertfordshire. A review of the annual reports in our transactions. Trans. Herts. Nat. Hist. Soc. Field Club 20: 141–150.
Parker, D.E., Legg, T.P. and Folland, C.K. (1992) A new daily Central England Temperature series, 1772–1991. Int. J. Climatol. 12: 317–342.
Pollard, E. and Yates, T.J. (1993) Monitoring butterflies for ecology and conservation. London, U.K.: Chapman and Hall.
Reid, P.C., Edwards, M., Hunt, H.G. and Warner, A.J. (1998) Phytoplankton change in the north Atlantic. Nature 391: 546.
Southern, H.N. (1938a) The spring migration of the swallow over Europe. British Birds 32: 4–7.
Southern, H.N. (1938b) The spring migration of the willow-warbler over Europe. Brit. Birds 32: 202–206.
Southern, H.N. (1939) The spring migration of the redstart over Europe. Brit. Birds 33: 34–38.
Southern, H.N. (1940) The spring migration of the wood-warbler over Europe. Brit. Birds 34: 4–79.
Southern, H.N. (1941) The spring migration of the red-backed shrike over Europe. Brit. Birds 35: 114–119.
Sparks, T.H. and Carey, P.D. (1995) The responses of species to climate over two centuries: an analysis of the Marsham phenological record, 1736–1947. J. Ecol. 83: 321–329.
Sparks, T.H., Carey, P.D., AND Combes, J. (1997) First leafing dates of trees in Surrey between 1947 and 1996. Lond. Nat. 76: 15–20.