results in a redistribution of biomass and energy flows on
the planet. This phenomenon is studied through collection,
analysis and interpretation of specific data on the movements
of different species of birds in different seasons on different
continents. In this regard, Northwest Russia occupies
a special position, because here runs the White Sea-Baltic
branch of the East Atlantic Flyway.
This book is essentially the second part of a two-volume
edition. The first part — “Migration of Birds of Northwest
Russia. Non-Passerines” — published in 2016 with the financial
support from Russian Foundation for Basic
Research. The book is based on a wealth of factual material
which has been amassed by a group of researchers
through years of activities. A special place in the material
is occupied by the data of ringing and in vivo investigations
of birds captured at the Ladoga ornithological station
(about 1 million), during the half century of its existence. In
the monograph devoted to migrating passerines, as in the
first part, the authors examine the problem of migration
through the prism of the concept of the migratory activity’s
position in the annual cycle of birds. It is shown that
although the forms of migratory activity vary widely,
periods of migration are a concrete manifestation of the
three original periods of mobility in the annual cycle of
seasonal events. A differential approach to the periods of
migration activity, in particular a clear distinction
between postfledging migration and postnuptial
migration, on the one hand, and postmolting migration,
on the other, allows to obtain new theoretical knowledge
about the evolution of migratory behavior in different
ecological and taxonomic groups of the Aves class.
The book is intended for ornithologists, ecologists,
conservationists, students, bird lovers.