National Repository of Grey Literature 4 records found  Search took 0.01 seconds. 
Development of abundance of hazel grouse (Bonasa bonasia) in the Šumava Mts
Červený, Jaroslav ; Bufka, L. ; Bürger, P.
In the past, the hazel grouse was o common bird but not as abundant as the capercillie in the Šumava Mts. Currently, the hazel grouse is the only species of the Šumava Mts. of tetraonid birds that is not directly endangered.
Development of abundance of black grouse (Tetrao tetrix) in the Šumava Mts
Bürger, P. ; Červený, Jaroslav ; Bufka, L.
After 1990, another decrease of black grouse occurred in the Šumava Mts. In 1994, only 306 individuals were found what represents a decrease by 47.8
Development of abundance of capercaillie (Tetrao urogallus) in the Šumava Mts
Bufka, L. ; Červený, Jaroslav ; Bürger, P.
General marked decrease of abundance of capercaillie population in the second half of the 20th century has afflicted the Šumava region less dramatically than the other regions of the Czech Republic. However, at the turn of the 70s and 80s, capercailli disappeared from the foothills of the Šumava Mts., and even the part of the population inhabiting the southeastern part of the Šumava Mts, came close to extinction.
Tetraonid birds in the Jeseníky Mts: chances for survival
Koubek, Petr ; Banaš, M.
The massif of the Hrubý Jeseník Mts. was known for occurrence and even hunting of capercaillie (Tetrao urogallus) as well as black grouse (Tetrao tetrix) in the 50s and 60s of the 20th century. However, even in this area, we have noticed a marked decre of abundance of both species. This is why we have been gathering all information about the occurrence of tetraonid birds at the Landscape Protected Area Jeseníky Mts. since 1987.

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