Pomarine Jaeger: Seasonal Occurrence & Geographic Distribution

Pomarine Jaeger Stercorarius pomarinus

Status: In Pelagic waters; rare to uncommon summer visitor, uncommon fall migrant and common winter resident.  Rare along the coast in winter.

Habitat: coastal and offshore waters. May be seen chasing gulls and terns along jetties or near shrimp boats.

Similar Species: Very similar to Parasitic Jaeger. Identification difficult. Pomarine is heavier bodied and a relatively longer and thicker bill. David Sibley, from The Sibley Guide to Birds, points out that, “the combination of dark head and light uppertail coverts is typical of Pomarine and is never shown by Parasitic. The large bill is sharply bicolored and contrasts with the dark face, often conspicuous at a distance.” Pomarine Jaegers, like the smaller Long-tailed Jaeger, have strongly barred uppertail coverts. The central tail feathers on adult birds are long, rounded and twisted. The tail feathers of adult Parasitic Jaegers are pointed.

© Copyright  Brad McKinney  31 October 31, 2004 (Status updated by Garett Hodne Nov 2014)

SEASONAL OCCURRENCE GRAPH OF POMARINE  JAEGER:

The graph below shows the number and date of all Pomarine Jaeger sightings on all Texas Pelagics from 1992 to 2015:

POJA Graph2015
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POMARINE  JAEGER – TEXAS PELAGICS SIGHTINGS DISTRIBUTION:

This map shows the geographic distribution of Pomarine Jaeger sightings (blue square) on 27 Texas Pelagics mostly from South Padre Island, but also includes 1 trip from Port Aransas and 2 trips from Port O’Connor. Sighting coordinates from the remaining 25 + Texas Pelagics are not available.

Pomarine Jaeger Sightings are evenly distributed over the shelf and fewer birds are seen in deep pelagic waters.


View Jaeger Distribution in a larger map

Click on the box in the upper left of the map to view the map legend.

Click on each sighting symbol and the data label will appear showing the time, date and the number of birds seen.

Click on the link on the bottom of the map to view a larger map.

 


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