Why: There is some evidence that omega-3 fatty acids may ease anxiety symptoms and lift your mood by lowering levels of stress chemicals such as adrenaline and cortisol in the body. Caned fatty fish, such as tuna and salmon, walnuts, and flax seeds are all great sources of omega-3 fatty acids.
As you may already know from reading How Butterflies Work or Where do butterflies get their striking colors?, butterfly wings are made of very thin layers of a hardened protein called chitin.
Caterpillars show no external evidence of sexuality, but pupae can be distinguished as male or female. A male pupa will have 2 tiny bumps close to it's tail, corresponding with the anal claspers of the adult butterfly or moth. It is also usually slimmer and lighter than a female pupa. Many other anatomical details of the adult butterfly can be seen on the pupa - e.g. antennae, legs, eyes, wing cases and palpi.