fr
de
it
en
es
nl
 Visitor Anonymous 
Homepage
Data base
 - 
Homepage data base
 - 
Our charter
  Sightings
    - 
Annual reports
  Galleries
    - 
All pictures
  Stats
Migration sites
Resources and links
The Migration Study Group
Our partners
Annual reports : Gruissan - étang de l'Ayrolle, 2021
Watchpoint
Graphs
News
Bird Reports
See cumulative daily totals and phenology graphs
 
Not available. This representation exists with one or all sites, one or all years and a single species.

Comparison of the duration of migration : This graph compares the duration of migration in number of days between different key percentages of migration. It is possible to compare several sites on the same graph.
Not available. This representation exists with one or all sites, one or all years and a single species.

Comparison of migration dates : This graph matches key percentages of migration with calendar days. It is possible to compare several sites in the same graph.
Not available. This representation exists with a single site, all years and a single species.

Interannual trend : This interannual graph represents the evolution between annual totals.
Not available. This representation exists with a single site, one or all years and a single species.

Phenological trend : This graph represents the evolution of the percentage of migration. Key percentages are indicated by vertical red bars.
Not available. This representation exists with a single site, all years and a single species.

Daily evolution : This interannual graph represents the trend of dates and key percentages of migration.
Not available. This representation exists with a single site, one or all years and a single species.

Totals by hour : This graph represents the distribution of the total number of birds by hour. When a specific year is chosen, the average of all the years of the migration watch is shown in grey.
Not available. This representation exists with a single site, one or all years and a single species.

Seasonal phenology : This graph represents the distribution of the daily passage total (the decadary total is symbolized by red bars). If a specific year is selected, the average of all years is shown in grey.
Not available. This representation exists with a single site, one or all years and a single species.

Relative migration : This graph represents the distribution in daily percentage of migration (percentage by decade being symbolized by red bars). If a specific year is chosen, the average of all years is shown in grey.
Not available. This representation exists with a single site, one or all years and a single species.

Seasonal phenology (decade) : This graph represents the migration total by decade. If a specific year is selected, the average of all years of the migration survey is shown in grey.
Not available. This representation exists with a single site, one or all years and a single species.

Hourly mean per decade : This graph shows the mean number of migrants per hour over ten-day periods. When a specific year is selected, the mean number of migrants calculated over all years of record is depicted in grey.
Not available. This representation exists with a single site, one or all years and a single species.

Seasonal phenology (5-day period) : This graph shows the numbers of migratory individuals over 5-day periods. If a specific year is selected, the average of all years is shown in grey.
Not available. This representation exists with a single site, one or all years and a single species.

Hourly mean per 5-day period : This graph shows the mean number of individuals per hour over 5-day periods. When a specific year is selected, the mean number of migrants calculated over all years of record is shown in grey.
Available. This representation exists with a single site, a single year and all the species.

Summary table : This graph represents the seasonal totals as well as the latest totals of the migration watch. The upper table represents the most significant species for the watchpoint.
Available. This representation exists with a single site, a single year and all the species.

Migration synthesis : This graph is representing migration periods for each species at the site in a given year
Available. This representation exists with one or all sites, one or all years and all the species.

Observation effort : This table shows the observer pressure at the watchpoint for all years or day by day for a selected year.
Not available. This representation exists with all sites combined, one or all years and a single species.

Distribution Map : This map shows the relative importance of the watchpoints for a selected species. The dots represent the number of individuals per season.

Period : from Monday, January 18th, 2021 until Sunday, May 2nd, 2021

Number of days of migration watch : 28
Number of hours of migration watch : 116h46

Number of birds : 49654
Sunday  2021 07h00-11h00- Duration : 04h00 
[Display all species]
Waning Gibbous (20 days) : Moonrise at 2h16 and moonset at 11h08
Sun : sunrise at 06h38 and sunset at 20h50
Day : dawn at 06h07 and dusk at 21h21
Comments :
07h00-08h00 : JL Guillemenet,08h00-09h00 : JL Guillemenet - Bruno Granger,09h00-10h00 : JL Guillemenet - Bruno Granger,10h00-11h00 : JL Guillemenet - Bruno Granger
 The most significant species
Total
  Show phenology  European Honey Buzzard (Pernis apivorus)
183
  Show phenology  Black Kite (Milvus migrans)
1246
  Show phenology  Western Marsh Harrier (Circus aeruginosus)
534
  Show phenology  Eurasian Sparrowhawk (Accipiter nisus)
374
  Show phenology  Common Kestrel (Falco tinnunculus)
620
  Show phenology  Eurasian Hobby (Falco subbuteo)
4
  Show phenology  Lesser Black-backed Gull (Larus fuscus)
79
  Show phenology  Little Tern (Sternula albifrons)
19
  Show phenology  Common Wood Pigeon (Columba palumbus)
1219
  Show phenology  Common Swift (Apus apus)
423
  Show phenology  European Bee-eater (Merops apiaster)
84
  Show phenology  Sand Martin (Riparia riparia)
398
  Show phenology  Barn Swallow (Hirundo rustica)
11366
  Show phenology  Red-rumped Swallow (Cecropis daurica)
8
  Show phenology  Western House Martin (Delichon urbicum)
1222
  Show phenology  Western Yellow Wagtail (Motacilla flava)
6670
  Show phenology  Common Linnet (Linaria cannabina)
4133
  Daily total
183
migrants
5
migrants
2
migrants
6
migrants
6
migrants
1
migrant
11
migrants
18
migrants
5
migrants
354
migrants
10
migrants
3
migrants
562
migrants
1
migrant
324
migrants
6
migrants
2
migrants
 Other species
Total
  Daily total
Visionature
VisioNature est un outil développé avec la collaboration du réseau LPO. Grâce aux technologies Internet, débutants, amateurs et professionnels naturalistes, peuvent partager en temps réel leur découverte et ainsi améliorer la connaissance et la protection de la faune

Biolovision Sàrl (Switzerland), 2003-2024