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Rossendale Birds Forum -> Other Wildlife Sightings -> CRAYFISH
Post Info TOPIC: CRAYFISH
wayner59


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CRAYFISH
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12 noon. I've just seen 2 crayfish together from the bridge at Lee Mill. First time I've ever seen them here. Is this bad news?



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Ste Rush


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Depends on species?

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brian


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Hi Wayne,

As Steve says the species is important, more than likely they would be White Clawed [indigenous] or Signal [invasive] they are not easy to separate from a distance in water.

Both species should be reported to the Enviromental agency, there web site has some excellent info on identification.

Regards Brian.



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KEVIN LISTER


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1 possibly 2 crayfish (guessing signal crayfish) at Hugh Mill in Waterfoot today. 1 seen at 10am & the same or another seen around 80 yards downstream at 4:30pm

cheers Kevin



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brian


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Hi Kevin,

Your pictures indicate they are White-Clawed Crayfish, very rare these days and should be reported to the EA for research purposes, Environment Agency hotline 0800 807060, or through the website.

Regards Brian.



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KEVIN LISTER


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Hi Brian

I have reported it to the Environment Agency. If anything comes of it I'll post it on here.

My limited knowledge of crayfish still leads me to think this is signal crayfish. The underside of the claw appears to be red, which is supposed to be one of the ID features of signal crayfish

cheers Kevin



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brian


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Hi Kevin,

Attached are a picture of each species, first is Signal, second is White-clawed, in my experience the Signal claws are always quite prominently red, where the White-clawed are paler, on your your pictures this seams to be the case.

Regards Brian1237DA5E-30D9-45B9-A6A9-832D1317CE27.jpeg4B439879-D4D6-41EC-ABB0-359D3B64CF38.jpeg



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KEVIN LISTER


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I had another crayfish around 60 yards downstream of the other crayfish today. Not heard anything back from the Environment Agency after emailing photos. The links below should take you to short videos of the crayfish

DSCN1129 | rossendalebirder | Flickr

DSCN1128 | rossendalebirder | Flickr

DSCN1164 | rossendalebirder | Flickr

cheers Kevin



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brian


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Excellent footage, the ones I see in the Irwell around Strongstry even through the water have much more red on the claws, when we had the pollution incident in April 2019 there were several dead ones in the river, some were taken by the EA and identified as signal.

As you probably know size is used as a species identifier but with no scale it is impossible to know.

Regards Brian.



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