Population size estimates represent indispensable tools for many research programs and for
conservation or management issues. Mountain ungulates in open areas are often surveyed …

Acoustic individuality may well play a big role during the mating season of many birds. Black
grouse (Lyrurus tetrix) produces two different long-distance calls during mating on leks …

The western capercaillie Tetrao urogallus, hereafter capercaillie, is the largest galliform bird
present in the boreal and montane forests of the Western Palearctic. Precise and accurate …

Estimating the size of ungulate populations dwelling forested habitats is technically difficult
and expensive. In particular, population assessment via conventional distance sampling …

Targeted lek surveys, in which historically active lekking areas are surveyed over multiple
years, are commonly used to monitor lek‐mating birds. Lek surveys are usually used in …

ABSTRACT Capsule: The Black Grouse is a primarily lekking species, but low population
density and lack of suitable habitat can lead to the establishment of non-lekking populations …

Prey abundance has been shown to influence the productivity of Gyrfalcons and other
raptors (Potapov 1997, Salamolard et al. 2000, Barichello and Mossop 2012, Mossop 2012) …

Les recensements de populations de lagopèdes alpin (Lagopus muta) mâles se font par
points d'écoute au printemps (fin mai–début juin). Plusieurs observateurs se placent à des …

Rock ptarmigan populations in the Alps are suffering an overall decline, and management
actions are needed to ensure their conservation. Yet wildlife management and conservation …

The rock ptarmigan (Lagopus muta) has a wide Holarctic geographical range, within which
its status changes locally from threatened to abundant. For the correct management of …