Number of Siberian Grouse Falcipennis Falcipennis (Hartlaub, 1855) in Bureya Nature Reserve
Siberian Grouse Falcipennis falcipennis (Hartlaub, 1855) in Bureya Nature Reserve occupies the subalpine larch forest and spruce groves, and also light larch forests. The route accounting of number of a Siberian Grouse in these ecosystems by specially developed technique showed that this look annually is numerous during the autumn period. Population density of a Siberian Grouse, average by years, during the autumn period makes 39.7 individuals/km<sup>2</sup>. Total number of a Siberian Grouse during the autumn period only in the main ecosystems of the top subbelt of a boreal forest belt of the Reserve can reach 90-100 thousand individuals. Total number and population density of a Siberian Grouse doesn't concede to these indicators Grouse, widespread in a taiga of North America: Canadian Spruce Grouse F. (Canachites) canadensis (Linnaeus, 1758) and Franklin's Grouse F. (Canachites) franklinii (Douglas, 1829). Earlier published data according to which the average annual number of a Siberian Grouse within all area of a look makes to 1 million individuals can be considered much underestimated.