In his latest blog, Living Rivers Officer David Johnson, takes a look at some of the larger specimens found at the bottom of the river sampling trays.

Have you ever wanted to know more about the smaller fish and larger invertebrates you can see in Hertfordshires chalk rivers? In his latest blog David gives useful information idenifying species of the finned and cray variety that are regularly found during volunteer river monitoring. To read David's blog click here.  

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