Proportion Of Migration Spent In Flight

Knowledge of the duration of migration, obtained from ring recoveries or radio-tracking, together with knowledge of the usual flight speed, enable us to calculate how much of the total journey time of different species is spent on the wing (Table 8.5). For example, Chaffinches Fringilla coelebs usually leave northern

Table 8.4 Six outward and six return migrations of the same radio-tagged adult female White Stork Ciconia ciconia tracked by satellite from its nesting place in Germany (57°N) to its wintering localities in different parts of Africa

Southward outward journey Northward return journey Overall

Table 8.4 Six outward and six return migrations of the same radio-tagged adult female White Stork Ciconia ciconia tracked by satellite from its nesting place in Germany (57°N) to its wintering localities in different parts of Africa

Year

Start

End

Days

Distance

Speed

Winter

Start

End

Days

Distance

Speed

Days on

Days in

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