Rašeliniště Přebuz
Invertebrates
The population of invertebrates is diverse thanks to the diversity of
conditions on the site. 53 Hymenoptera species from 10 families were observed.
Solitary species are widely represented. The biodiversity is made possible by
the sandy substrate with disconnected vegetation, making it easy for insects to
build their nests. Amophila Pubescenc and Ashy Mining Bee, two endangered
species, are notably present. 
*** The pit tip is the home to 17 species of butterflies, including
two endangered ones: Lulworth Skipper and Scarce Swallowtail. Molluscs are
represented through three of the most common species: Grape Snail, White-lipped
Snail and Heath Snail.
The Lulworth Skipper is on the Czech Invertebrate Red List as endangered
species. The adult skipper has wings 25–28mm in length. The underlying colour
of the top of the wings is light brown, with muted yellow spots. The forewing of
male has a black line (of about 5mm). The underside of the wings is yellow; the
forewings have muted yellow spots, rear wings have no markings. The butterfly
occurs mainly on flowery edges of thermophilous oak forests, but it can be found
also in limestones and – as you can see here – also on waste heaps. 
*** Only one generation of the butterfly hatches in a year. The
caterpillar, immediately after hatching and – interestingly – without
eating anything, it spins a cocoon in which it spends the winter. In the spring
it bites its way out and starts grazing on young leaves of Heath
False Brome.
The populations have dwindled in the past 50 years, mainly as a result of
highly specific habitat requirements. To keep the population stable, it is
recommended to let shrubs cover some of the locations. 
