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3.4.3 Other vertebrates
Species and frequency information are given (Table 3.5).
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As in previous years rabbits were very commonly seen, using railway
verges as refuges wthilst foraging on adjacent agricultural land.
Bank voles, wood mice and shrews were occasionally sighted, but,
without recourse to trapping, their numbers are likely to be
underestimated. Other expected small mammals, including badger,
hare, hedgehog, mole and rat, were not recorded on LMR.
Reptile and amphibian sightings were comparable with previous years
records, and included several good-sized adders.
3.4.4 Field observed invertebrates
With the exception of butterflies, where species names are given
(Table 3.6) it was not practicable to identify consistently other
individuals beyond group level in the field.
Fifteen species of butterfly were sighted,of which the large and small
whites and small tortoiseshell were the most common, whilst the small
skipper and speckled wood were seen only once. The red admiral
had not previously been recorded during the survey, but was present at
4 sites during the summer.
All other field-identified invertebrates are shown in Table 3.7,
and the most consistently recorded include the snails, Cepeanemoralis
moths,
Zygaenafilipendul and Callimorphajacohaea;froghopper, Cercopis
vulnerataand gnat, Culexpipiens.
and C. hortensis;slugs, Arianater and A. hortensi:s;
3.4.5 Soil invertebrates
Measured soil samples were removed from the cess, verge and adjacent
land at 20 random sites. The samples were placed in a Tollgren
apparatus (Murphy 1962) and the extracted invertebrates recorded
Identification was not normally beyond class level, but it wns
thought that numerical distribution was sufficiently interesting to
warrant inclusion in this report.
All groups recorded are shown in Table 3.8 . It will be seen that,
with the exception of the pauropod, all groups occurring in the
railway cess were also found in the verges and in adjacent land.
However, a large proportion of the groups occurring elsewhere were not
recorded from the cess. The numbers of groups and individuals
site-1 were:
Cess :_4-9 groups site.); 16.9 individuals-site-1
Verge : 7-9 groups site-1; 81.3 individuals site-1
Adjacent land : 8-9 groups site-1; 61.8 individuals site-1
The cess is composed of porous cinder to a depth of several inches,
enabling drainage of rain water and fluid waste (often nitrogenous)'
expelled from trains.. It is kept weed-free-by regular spraying with
herbicides and is.often contaminated with.oil, and to a lesser extent,
litter.
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