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Annual reports : Gruissan - étang de l'Ayrolle, 2017
Watchpoint
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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 Sunday, January 29th, 2017 until Wednesday, March 29th, 2017

Number of days of migration watch : 26
Number of hours of migration watch : 125h30

Number of birds : 57924
Wednesday  2017 07h20-15h30 07h20-15h30 - Duration : 08h10 
Waxing Crescent (1 day) : Moonrise at 8h36 and moonset at 21h56
Sun : sunrise at 07h33 and sunset at 20h10
Day : dawn at 07h05 and dusk at 20h39
Comments :
07h20-15h30 : suivi étang ayrolle, D. Clément, S. Garandeau, T. Guillosson, S. Reyt
 The most significant species
Total
 Show the data Show phenology Common species Great Cormorant (Phalacrocorax carbo)
410
 Show the data Show phenology Common species Grey Heron (Ardea cinerea)
55
 Show the data Show phenology Common species Purple Heron (Ardea purpurea)
1
 Show the data Show phenology Common species Black Stork (Ciconia nigra)
17
 Show the data Show phenology Common species White Stork (Ciconia ciconia)
3696
 Show the data Show phenology Common species Black Kite (Milvus migrans)
709
 Show the data Show phenology Common species Western Marsh Harrier (Circus aeruginosus)
139
 Show the data Show phenology Common species Eurasian Sparrowhawk (Accipiter nisus)
264
 Show the data Show phenology Common species Common Kestrel (Falco tinnunculus)
226
 Show the data Show phenology Common species Merlin (Falco columbarius)
6
 Show the data Show phenology Common species Peregrine Falcon (Falco peregrinus)
1
 Show the data Show phenology Common species Slender-billed Gull (Chroicocephalus genei)
88
 Show the data Show phenology Common species Sandwich Tern (Sterna sandvicensis)
113
 Show the data Show phenology Common species Common Tern (Sterna hirundo)
9
 Show the data Show phenology Common species Common Wood Pigeon (Columba palumbus)
786
 Show the data Show phenology Common species Alpine Swift (Apus melba)
23
 Show the data Show phenology Common species Barn Swallow (Hirundo rustica)
235
 Show the data Show phenology Common species Red-rumped Swallow (Cecropis daurica)
2
 Show the data Show phenology Common species Common House Martin (Delichon urbicum)
191
 Show the data Show phenology Common species European Serin (Serinus serinus)
1823
 Show the data Show phenology Common species European Goldfinch (Carduelis carduelis)
400
 Show the data Show phenology Common species Common Linnet (Carduelis cannabina)
262
  Daily total
6
migrants
7
migrants
1
migrant
1
migrant
8
migrants
11
migrants
30
migrants
25
migrants
9
migrants
1
migrant
1
migrant
39
migrants
69
migrants
9
migrants
15
migrants
5
migrants
33
migrants
1
migrant
2
migrants
4
migrants
6
migrants
22
migrants
 Other species
Total
 Show the data Common species Pink-backed Pelican (Pelecanus rufescens)
15
 Show the data Common species Eurasian Oystercatcher (Haematopus ostralegus)
2
 Show the data Common species Kentish Plover (Charadrius alexandrinus)
7
 Show the data Common species Grey Plover (Pluvialis squatarola)
375
 Show the data Common species Carrion Crow (Corvus corone)
27
  Daily total
15
migrants
2
migrants
7
migrants
66
migrants
1
migrant
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