Phenology in Essex: lessons from the past and examples of recent trends 35
Figure 3. The relationship between mean appearance date of honey bee in Essex 1891-1927
and February mean temperature. The two aberrant points are based on single values only.
Honey bee
February temperature
Figure 4. Changes in the first arrival times of sand martin in Essex 1964-1997. The solid line
represents the underlying, smoothed, trend.
Sand martin
1975 1985
Year
Essex Naturalist (New Series) 17 (2000)