Bird Ringing
The BTO Ringing Scheme
Why do we ring birds?
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has been discovered about birds by watching and counting them,
but such methods rarely allow birds to be identified as individuals.
This is essential if we are to learn about how long they live
and when and where they move, questions that are vital for
bird conservation. Placing a lightweight, uniquely numbered,
metal ring around a bird’s leg provides a reliable and
harmless method of identifying birds as individuals. Each
ring also has an address so that anyone finding a ringed bird
can help by reporting where and when it was found and what
happened to it. Some ringing projects also use colour rings
to allow individual birds to be identified without being caught.
Although we have been ringing birds in Britain and Ireland
for nearly 100 years, we are still discovering new facts about
migration routes and wintering areas. However, the main focus
of the Ringing Scheme today is monitoring bird populations.
Ringing allows us to study how many young birds leave the
nest and survive to become adults, as well as how many adults
survive the stresses of breeding, migration and severe weather.
Changes in survival rates and other aspects of birds’
biology help us to understand the causes of population declines.
Such information is so important for conservation that the
BTO runs two special projects to collect it. The Constant
Effort Sites (CES) scheme provides information on population
size, breeding success and survival of bird species living
in scrub and wetland habitats. Ringers work at over 130 CES
scheme sites each year. The Retrapping Adults for Survival
(RAS) project gathers survival data for a wide range of species,
particularly those of current conservation concern.
Ringing allowed us to show that declines in the number of
Sedge Warblers breeding in Britain and Ireland was linked
to lower levels of rainfall in their African wintering quarters.
We have also found that the recent dramatic decline in the
numbers of Song Thrushes has been caused by a reduction in
the survival rate of young birds. This information will help
us to identify the environmental factors responsible for the
decline.
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Does ringing affect
the birds?
The simple answer is no. Ringing is carried out by skilled ringers
with the utmost consideration for the birds’ welfare. It is
not surprising that ringing has little effect on birds because relative
to the bird’s weight, wearing a ring is similar to a person
carrying a mobile phone. It is essential that birds are not affected
unduly by the fitting and wearing of a ring; if they were, ringing
would not tell us how normal birds behave. Many studies have shown
that birds ringed during the breeding season quickly return to incubating
eggs, or feeding chicks, once they are released, and long distance
migrants continue to travel thousands of miles between breeding
and wintering grounds.
How are birds caught
for ringing?
| Birds
are caught for ringing in a variety of ways. About twenty
percent are ringed as chicks in the nest; this is valuable
because their precise age and origin are then known. The method
most frequently used to catch fully-grown birds is the mist
net. This is a fine net erected between poles, and is designed
to catch birds in flight. This method is very effective but
birds can only be removed safely from mist nets by experienced
ringers who have received special training.
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Learning to ring
The skills necessary to become a ringer can only be learnt by practice
under the close supervision of experienced ringers; effectively
an apprenticeship. Essential skills include the safe and efficient
catching and handling of birds, identification, ageing, measuring
and record keeping. For this reason, ringers undertake a period
of training, generally of one or two years, during which they are
only allowed to ring birds under supervision. Their progress is
assessed by an independent ringer, whose own ability has been judged
to be of a high standard. In this way the BTO Ringing Scheme maintains
very high standards of bird welfare and scientific data. A BTO ringing
permit is also a legal requirement for anyone ringing birds. It
has to be renewed annually.
Ringing in Britain
and Ireland
The British and Irish Ringing Scheme is organised by the BTO. Over
800,000 birds are ringed in Britain and Ireland each year by over
2,000 trained ringers, most of whom are volunteers. On average fewer
than one out of every fifty birds ringed is subsequently reported
to the BTO, so every report of a ringed bird is of value.
More information on how to become a bird ringer can be found here.
Details of the BTO's Ringing Courses for ringers can be found here.
Links to some Ringing Groups can be found here.
If you find a ringed
bird...
Click here to use our
on-line reporting form
The BTO relies on people reporting ringed birds, so if you find
a ringed bird please contact the Ringing Unit – see contact
details below or visit:
www.ring.ac
In your report please include the following information:
Ring number
Please give the full ring number and, if the bird is dead, please
enclose the ring securely taped to your letter. If you wish to keep
the ring it can be returned to you. If it is not a BTO ring (address
NOT starting BTO or British Museum), please give the address as
well.
Where and when
Give the location of where the bird was found, including the name
of the nearest town or village and a grid reference if possible.
Also tell us the date when the ring was found.
The bird
Write down the type or species of bird, if you know.
Circumstances
It is useful for us to know if the bird was alive or dead. If
dead, please give the cause of death if known, e.g. was it hit by
a car, brought in by a cat, or oiled on a beach? Also note if the
bird was freshly dead or decomposed. If the bird is still alive,
please say what happened to it. Remember though, if you see a healthy
wild bird wearing a ring (feeding on your bird table for example),
you must not try to catch it. In these situations you may be able
to read the ring through a telescope.
Your details
Don’t forget to give us your name and address so that we
can tell you when and where the bird was ringed. Details will normally
be sent within a month, but there may be delays at busy times of
year. If you send a report of a ringed bird by email, please include
your postal address.
Please remember, if you see
a healthy wild bird wearing a ring, feeding on your bird table for
example, you must not try to catch it. In these situations you may
be able to read the ring number through a telescope.
More Information
Results from bird ringing are published in a wide range of books,
magazines and scientific journals. These include the Ringing Scheme
journal Ringing & Migration,
which includes the annual ringing report, and the BTO journal Bird
Study and BTO
News.
If you would like more information about bird ringing, or are interested
in training to become a bird ringer,
please contact: The Ringing Unit, BTO, The Nunnery, Thetford, Norfolk
IP24 2PU; Tel: 01842 750050; Fax: 01842 750030; E-mail:
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Part of the BTO Ringing Scheme is funded by a partnership of the
BTO, the Joint Nature Conservation Committee (on behalf of Natural England, Scottish Natural Heritage and the Countryside Council for
Wales, and also on behalf of the Environment and Heritage Service
in Northern Ireland),. The Scheme also receives support from Duchas
the Heritage Service - National Parks and Wildlife (Ireland).The
volunteer ringers give freely of their time and expertise and also
provide a substantial part of the Scheme's funding.
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