http://www.vogelwarte.ch
http://www.ala-schweiz.ch/
https://www.ficedula.ch
https://www.nosoiseaux.ch
 
fr
de
it
en
Visitor Anonymous
 
Ornitho.ch homepage
The partners
Consulting
  Sightings
    - 
The past 2 days
    - 
The past 5 days
    - 
The past 15 days
 - 
Galleries
Data and analyses
 - 
Eurasian Bittern 20-21
 - 
Little Stint 2020
 - 
Common Redstart 2020
 - 
Yellow-browed Warbler 2020
 - 
Meadow Pipit 2020
 - 
Great Grey Shrike 2020
 - 
Hawfinch 2020
 - 
Swiss bird status
Information
 - 
Latest news
 - 
Species partially hidden
 - 
Code of conduct
 - 
Coordinates conversions
  Help
    - 
Symbol explanation
    - 
FAQ
    - 
Videos & instructions
  Stats
Latest news
page :
 
 
1
2
3
4
5
6
7
8
9
>
>|
item/page :
count : 409
 
Friday, October 23rd, 2020
avinews
Birds
Bulletin of the Ornithological Information Service from the Swiss Ornithological Institute
posted by Bernard Volet
 
Monday, October 12th, 2020
atlasnews
Birds
European Breeding Bird Atlas 2 can now be ordered
posted by Hans Schmid
 
Friday, September 4th, 2020
tipnews
Birds
How to document a sighting?
posted by Bernard Volet
 
Tuesday, August 25th, 2020
tipnews
Birds
Which species should you count?
posted by Bernard Volet
 
Wednesday, August 19th, 2020
tipnews
Birds
The House Sparrow south of Bellinzona
posted by Bernard Volet
 
Sunday, August 16th, 2020
avinews
Birds
Communication of the Swiss Rarities Committee
posted by Bernard Volet
 
Friday, August 14th, 2020
tipnews
Birds
Atlas code in late summer
posted by Bernard Volet
 
Thursday, July 16th, 2020
tipnews
Birds
Sightings from mountainous regions
posted by Bernard Volet
 
Thursday, July 2nd, 2020
tipnews
Birds
Young birds: Which atlas code to use and how to record birds age?

Towards summer, the number of immature birds increases. As they are a proof of a successful breeding, it is important to report them as correctly as possible.

The atlas code is the parameter to use. We recommend that you always use the highest possible code corresponding to the given situation. The following codes can be used to confirm the presence of young birds from the current breeding season: 13, 16 and 19.

Atlas code 19 is used when you find a nest containing eggs or young birds. It is not mandatory that you see the young birds: begging calls are sufficient, e.g. in a nesting box, or if you see adult birds carrying food to the nest at regular intervals.

Atlas code 16 is used if you see at least one adult bird carrying food for the young birds. It should not be used, however, if an adult is bringing food to the nest as part of the courtship or feeds its partner. On the other hand, this code can also be used, especially for songbirds, if you observe an adult feeding a young bird outside the nest.

Atlas code 13 refers to young birds that have left the nest. For nidicolous birds (e.g. songbirds, birds of prey), the code should only be used in the first days after the young birds leave the nest and if they are still clearly dependent on their parents. After that time, the young birds often begin extensive reconnaissance flights far away from their breeding area. As an extreme case one should mention young Black-crowned Night-Herons: they can appear in June, often still have down feathers on their head, but have been hatched outside the country. In such cases definitely do not use an atlas code! In the case of precocial birds, especially ducks, the code is used as long as the families are still easily recognizable as such. It can also be used for large fledglings until they become fledged.

In the detailed information field regarding age and sex, there are various ways to document young birds from the current calendar year: "chick", "1st year" and "immature". The term "chick" refers both to young nidicolous birds in the nest and precocial birds still wearing down feathers. Nidicolous young birds outside the nest and precocial birds which are already wearing the juvenile dress are called "1st year". Of course a chick is also a 1st year old bird and it is not wrong to call a chick that way - it is just less precise. The term "immature", on the other hand, is very imprecise and should be avoided if possible for birds that can be clearly identified as this year's birds.

Furthermore we would like to point out that it is very valuable for duck families if you indicate the number of young birds/families as well as the size of the young birds in eighths (relative to the mother) under the remarks field. See leaflet "Altersbestimmung bei Jungenten / Détermination de l'âge des canetons".

The more precise your sightings are documented, the easier it is to interpret them correctly. Many thanks for your help!

posted by Bernard Volet
 
Tuesday, June 9th, 2020
tipnews
Birds
While birdwatching, be irreproachable!
posted by Sämi Wechsler
page :
 
 
1
2
3
4
5
6
7
8
9
>
>|
item/page :
count : 409
 
Biolovision Sàrl (Switzerland), 2003-2020