Thanks to Lorenzo and Page for suggestions used in this week's episode, and a belated thanks to Ethan for last week's episode! Let's learn about some of the cutest invertebrates out there!

Further reading:

Photosynthesis-like process found in insects

Mystery of the Venezuelan Poodle Moth

Further viewing:

Dr. Arthur Anker's photos from his Venezuela trip, including the poodle moth

The pea aphid, red morph and regular green

So many ladybugs:

The sea bunny is a real animal, but it's not a real bunny:

A larval sea bunny is SO TINY that fingertip looks like it's the size of a BUILDING:

The bobtail squid not hiding (left) and hiding (right):

The bobtail squid is SO CUTE I MIGHT DIE:

The Venezuelan poodle moth:

Not a Venezuelan poodle moth--it's a female muslin moth from Eurasia:

Not a Venezuelan poodle moth--it's a silkworm moth from Asia:

The dot-lined white moth:

Show transcript:

Welcome to Strange Animals Podcast. I’m your host, Kate Shaw.

This week I promised we’d cover a cute, happy animal to make up for last week’s extinction event episode, but instead of mammals let’s look at some cute invertebrates! One of them is even a mystery animal. Thanks to Page and Lorenzo for suggesting two of the animals we’re going to cover today!

We’ll start with Lorenzo’s suggestion, the pea aphid. Years and years ago I spent a slow day at work making a list of cute foods with a coworker, and peas were at the top of the list. Blueberries were second and I don’t remember the rest of the list. Generally, cuteness depended on how small the food was and how round. Aphids are really small and peas are round, so the pea aphid has to be adorable.

The pea aphid, however, is not round. It’s shaped sort of like a tiny pale-green teardrop with long legs, long antennae, and teeny black dots for eyes. It’s actually kind of big for an aphid, not that that’s saying much since it only grows 4 mm long at most. It’s called the pea aphid because it likes to live on pea plants, although it’s also happy on plants related to peas, such as beans, clover, and alfalfa. Cute as it is, farmers and gardeners do not like the pea aphid because it eats the sap of the plants it lives on, which can weaken the plant and can spread plant diseases.

During most of the year, all pea aphids are females. Each adult produces eggs that don’t need to be fertilized to hatch, but instead of laying her eggs like most insects, they develop inside her and she gives birth to live babies, all of them female. An aphid can have up to 12 babies a day, called nymphs, and the nymphs grow up in about a week or a little longer. Then they too start having babies. Even though lots of other insects and other animals eat aphids, as you can see, they will always be numerous.

As the summer turns to fall and the days become shorter, some of the baby aphids are born with wings. Some are also born male, and sometimes the males also have wings, although they might not have mouths. These males and winged females mate and the females fly off to lay their eggs on clover and alfalfa plants, assuming they aren’t already on clover or alfalfa plants. The eggs don’t hatch until spring, and all the resulting nymphs are female.

Sometimes winged females are born if the plants where the aphids live get too crowded. The winged females can fly away and find new plants.

If you’ve ever had a garden, you’re probably familiar with aphids. They spend most of the time on the undersides of leaves, drinking sap through specialized mouthparts called stylets. You may also have noticed that when you try to smush the aphids, all of them immediately drop to the ground. This protects them not just from being smooshed by a gardener’s thumb, but from being eaten along with the leaves when a deer or other animal browses on the plants where they live.

Sometimes, instead of being leaf green,