[Syrphidae] need help with the conservation of hoverflies

[muscapaul]

Keeping specimens in a cyanide jar for too long results in yellow turning
into orange and red...

Paul

On 16 June 2010 16:02, Andrew Whittington <awhittington at btopenworld.com>wrote:

> while cyanide keeps yellows fresh (but few people use cyanide these days).
>
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