Can you indentify these worms? Readers’ nature queries

Ethna Viney on New Zealand flatworms, giant house spiders and black herons

Early stages of New Zealand flatworms.
Early stages of New Zealand flatworms.

Could you identify the worms in the attached picture? I found several clusters of these under stones in my garden recently. I also found a couple of New Zealand flatworms under pots in my garden. – Anne Johnston, Co Mayo

They look very much like the early stage of New Zealand flatworms.

Lots of these urchins were washed on to a section of the beach at Salthill, Galway. I was wondering why and if they were dead. – Ann Mulvihill, Cloonboo, Co Galway

Potato urchins
Potato urchins

These potato urchins are dead, probably because of a storm. When they are alive they are covered with dense short spines.

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In one of the last remaining open stretches of the river Poddle, I saw a bird that can only be described as a black heron. I'm very familiar with grey herons and there is a local one known as "Bertie Aheron". – Denis Goodbody, Harold's Cross, Dublin 6W

There is anecdotal evidence from Britain of sightings of black herons thought to be melanistic.

I found this spider in our kitchen. What type is it? – Sean Malone, Blackrock, Co Dublin

Giant house spider, Eratigena gigantea.
Giant house spider, Eratigena gigantea.

It’s one of the giant house spiders, probably Eratigena gigantea.

Alan Flett, Delgany, Co Wicklow, and John O'Connor, Rathgar, Dublin 6, watched a young otter emerge from a pond in the National Botanic Gardens, Kilmacurragh, Co Wicklow, and act in a playful manner around their feet. At one stage it rolled over on its back as if it wanted to have its belly tickled. When it saw a dog it slid back into the pond and disappeared.

This speckled wood butterfly was out in mid-March – a bit early, I would have thought. – Frank Folan, Ballyvaughan Co Clare.

Speckled wood butterfly
Speckled wood butterfly

In fact just on time.

Ethna Viney welcomes observations and photographs at Thallabawn, Louisburgh, Co Mayo, F28 F978, or by email at viney@anu.ie. Include a postal address, please.