Raw Birds

Tuesday 6 August 2013

RAFT SPIDER (Dolomedes fimbriatus) Girley Bog, Drewstown Woods, County Meath, Ireland

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The Raft Spider (Dolomedes fimbriatus) is a semi-aquatic member of the family Pisauridaeone which is in the genus Dolomedes. It is one of Ireland’s largest spiders. Also known as the Hunting Spider or the Jesus Christ spider for its ability to walk on water. It occurs in sphagnum bogs. Main prey items include aquatic and terrestrial insects, invertebrates as well as tadpoles which it detects using its forelegs to sense any vibrations on the water surface. If threatened, it can submerge itself under water for up to 60 minutes.

Patrick J. O'Keeffe / Raw Birds

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The Yellow Legged Gull (Larus michahellis) is of the family Laridae which is in the genus Larus. Up until recently it was considered as a race of Herring Gull (Larus argentatus) but has now been given full species status. Post breeding populations disperse north and east. From July onward it occurs in good numbers in southern Britain but is an uncommon and scarce species in Ireland.

There are two subspecies recognised:

Larus michahellis michahellis - breeds in parts of western and southern Europe, as well as the Mediterranean Basin.

Larus michahellis atlantis - known as Atlantic Gull, breeds on the Atlantic coasts of France, Iberia, Morocco, Canary Islands, Madeira and the Azores where a dark headed form occurs.

Patrick J. O'Keeffe / Raw Birds

Yellow Legged Gull (Larus michahellis) distribution map