Pomarine Jaeger / Middelste Jager

Pomarine Jaeger (Stercorarius pomarinus)

Pictures (click on them to enlarge)
© Marijke de Boer	© Tomas Willems	© Tomas Willems
© Tomas Willems	© Jim Saulino	© Jim Saulino
© Tomas Willems	coast Totness non breeding adult © Rick Jacobson	Totness © Rick Jacobson

Pomarine Jaeger: This largest Jaeger comes to the Surinamese coast and once a group of 20 was reported in April 2104 (Tomas Willems) not far from the coast on open sea (probably migrating). They were regularly seen from a research vessel farther from the coast in June to September 2012.
The photos were made by Marijke de Boer in June 2012 and Tomas Willems in November 2014 and Jim Saulino in juli 2024. Rick Jacobson saw in May 2024 a bird on the coast at Totness.

Distribution

Each small square indicates the observation of at least one (group) of these birds, the medium ones at least four observations on different days and the largest ones ten or more. The color of each square indicates: blue for coastal area, yellow for savanna and red for rainforest.
Not all places in Suriname have been equally often visited by birders, so the distribution of the squares gives an indication of the whereabouts of the birds, but also of the birders. Some places deep in the south have no reported bird observations, by experienced birders, within 60 kilometer.

Abundance in different areas
coastal zone (blue dots on the map) :
northern savannas (yellow dots (in the north)) :
rainforest under 400 m (red dots) :
rainforest above 400 m (red dots) :
Sipaliwini savanna (yellow dots (in the south)) :
A blank is shown if not convincingly reported in the zone. Data interpreted by Arie Spaans, Otte Ottema and Jan Hein Ribot.

Names
Scientific name:	Stercorarius pomarinus
Order:	Charadriiformes
Family:	Stercorariidae, 5 in Suriname
Dutch:	Middelste Jager
English:	Pomarine Jaeger
Sranan ('Surinamese'):
Guyana:
Papiamento:
Spanish (Venezuela):
Portugese (Brazil):
Arowak:
Carib:
French:

Observations through the year	Observations of breeding through the year

The 55 reported observations of this bird in Suriname, mainly for the last 50 years up to 2018, have been grouped by month. More birds on one day are counted as one observation. Of course, if the graph should depict the total number of birds seen, the differences between the months could be much more pronounced.	The reported breeding observations of this bird in Suriname. Most observations are about nest with eggs, some about fledglings, or feeding at a nest or the building of a nest. Of the about 5000 nests and eggs found for all species together, about 1/3 comes from the egg collection of Penard between 1896 and 1905. For some reason most collecting then was done in the first half of each year, so the shown distribution does not necessarily reflect the actual breeding preferences. The main dry season in Suriname is reckoned to be from half August to the end of November, the main wet season from half April to half August, but the the timing of begin and end does vary from year to year. Around March a second dry season often occurs.

Observations through the year

Observations of breeding through the year

The 55 reported observations of this bird in Suriname, mainly for the last 50 years up to 2018, have been grouped by month. More birds on one day are counted as one observation. Of course, if the graph should depict the total number of birds seen, the differences between the months could be much more pronounced.

The reported breeding observations of this bird in Suriname. Most observations are about nest with eggs, some about fledglings, or feeding at a nest or the building of a nest.

Of the about 5000 nests and eggs found for all species together, about 1/3 comes from the egg collection of Penard between 1896 and 1905. For some reason most collecting then was done in the first half of each year, so the shown distribution does not necessarily reflect the actual breeding preferences.
The main dry season in Suriname is reckoned to be from half August to the end of November, the main wet season from half April to half August, but the the timing of begin and end does vary from year to year. Around March a second dry season often occurs.

Last update: September 2024 by Jan Hein Ribot. Please mail your comments, photos to: jhribot ( residing at ) gmail (point!) com.
observations can be uploaded to suriname.observation.org or ebird.org ).