E. Pulliainen et al., PHENOLOGY AND HABITATS OF CARABUS-GLABRATUS PAYKULL (COLEOPTERA, CARABIDAE) IN NE FINLAND, Entomologica Fennica, 4(1), 1993, pp. 27-30
476 individuals of Carabus glabratus were collected in the years 1989-
90 with pit-fall traps in the Varriotunturi fell terrain in NE Finland
. The catch in 1990 was about twice as great as in the previous year.
The tertiary sex ratio was even. The main habitat was Scots pine fores
t 370 m a.s.l., but the species also occurred in abundance in the moun
tain birch forest zone, in spruce forest, on a Nardus stricta sloping
fen and on the shore of Lake Kuutsjarvi, whereas the treeless summit o
f the fell was almost totally avoided. The main activity period was at
the end of June and the beginning of July, the males occurring over a
shorter period. Daily catches closely followed the temperature curves
.