|MadSci Network: Zoology|
Dear Anne, I have information only on the crayfishes of the U.S. (Pennak, R.W., Fresh- water invertebrates of the United States, 3rd ed., 1989). According to Pennak, some U.S. species live in burrows in pastures where there is no open water. If similar species also exist in the UK, one may encounter them in areas away from ponds and rivers, especially at dusk and dawn (or at night) when they are most active. Pennak also indicates that some U.S. species migrate overland after spawning in the autumn. Perhaps, this is what you are witnessing in the UK. For more specific information on the habits and ecology of the crayfishes of the UK, I suggest you contact someone there who works with them. Regards. Aydin Orstan
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