beatrix potter

beatrixpotter

This week on Draw With Me, we were inspired by English writer, illustrator, natural scientist, and conservationist Beatrix Potter. Her books weren’t a big part of my childhood … maybe we had one or two? But now I’m impressed by her scientific illustrations and mycological studies. At her death in 1943, Potter bequeathed nearly all her property to the National Trust, including more than 4,000 acres (16 km²) of land, sixteen farms, numerous cottages, and herds of cattle and Herdwick sheep. At the time, it was the largest donation ever made to the National Trust, playing a crucial role in preserving the landscape that now forms part of the Lake District National Park. Thank you Beatrix!

national moth week

It’s National Moth Week again, so we sketched moths (and their larvae) on Draw With Me.

Halysidota tessellaris, the banded tussock moth, is found in North America from southern Canada south through Texas and central Florida. Adult moths are attracted to decaying plants with pyrrolizidine alkaloids. They regurgitate on them, then drink the fluids, and thus acquire defensive chemicals that offer protection from predators.

Megalopyge crispata, the black-waved flannel moth, is found along the east coast of the United States, and as far inland as Oklahoma. The caterpillars produce a venom, delivered through hollow hairs that penetrate the skin, that can cause pain, headache, inflamed lymph glands and dermatitis. They may look cute and furry, but don’t go petting them!

Nephropidae vs Palinuridae

The theme for this week’s Draw with Me was lobsters, both “true” and “spiny”.

Although they superficially resemble each other in terms of overall shape and having a hard carapace and exoskeleton, the two groups are not closely related. Spiny lobsters (Palinuridae family) can be easily distinguished from true lobsters by their very long, thick, spiny antennae and by the lack of claws. True lobsters (Nephropidae family) have much thinner antennae, and claws on the first three pairs of legs, with the first being particularly enlarged.

Spiny lobsters are found in almost all warm seas, including the Caribbean and the Mediterranean Sea, but are particularly common in Australasia (where they are usually referred to as crayfish or sea crayfish) and in South Africa.

On the other hand, the American lobster (Homarus americanus)—also known as Atlantic lobster, Canadian lobster, northern lobster or Maine lobster—thrives in cold, shallow waters. I wonder if the claw growth is an adaptation more useful in colder oceans. If so, why?