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Bird Ringing for Science
and Conservation
Birds are personalities
Individuals of the same species and sex have behavioural
and physiological differences, even in standard conditions. In humans,
many of these differences are treated as expressions of individual
variation in personality. Yet in other animals, such explanations
have often been neglected, the differences interpreted instead as
either the consequence of inaccurate measurements or as non-adaptive
variation.
Putting a ring to a bird’s leg makes the
bird a recognizable individual whose individual life history and
fate can be followed. Personalities are general properties of birds,
other animals, and humans. Recent studies in birds suggest that
animal personality can be studied objectively. Such work has used
four approaches in parallel: (1) descriptive studies, including
the investigation of links among several behaviours and their specificity
across situations, (2) genetic and physiological research on causal
mechanisms underlying relations among several behaviours of the
same profile, (3) ontogenetic studies on plasticity and environmental
malleability, and (4) field studies on survival and reproduction
towards understanding how different types of personality are maintained.
Different personality types may react differently
to environmental changes and may show differential vulnerability
to stress, leading to differences in welfare. Ultimately, such differences
can have major impacts on individual fitness, response to environmental
change, geographic distribution, and even rates of speciation.
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Special rings and various other marks can
be used to identify birds at a distance without needing to catch
them again. These White-fronted Geese were marked with colour
neck bands, each individually identified by numbers or letters. |
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