I want to know —
have you ever seen one of these?
This is a Swallowtail butterfly.
Papilio machaon. One of the most
spectacular insects in Europe —
and one that most people have
never seen outside a photograph.
I found this one this week on the
limestone plateau of Serras de Aire
e Candeeiros, resting on bare ground
in the morning sun.
That behaviour has a reason.
Swallowtails are cold-blooded.
On cool spring mornings they seek
out warm pale surfaces — limestone,
sand, dry soil — and open their
wings at precisely this angle to
maximise the surface area exposed
to sunlight.
It is not resting.
It is fuelling up.
In about twenty minutes it will
lift off and you will understand
immediately why it has that name.
---
The blue on the hindwing is not
pigment. It is structure —
microscopic scales that refract
light the way a soap bubble does.
The colour exists only because
of the angle between the wing,
the light, and your eye.
Move slightly and it disappears.
A butterfly that is partly made
of geometry.
---
Now I want to hear from you.
Have you ever seen a Swallowtail
in the wild? Where were you?
What were you doing when it appeared?
Tell me in the comments.
I read every single one. 🦋
#Swallowtail #PapilioMachaon
#ButterfliesOfPortugal
#SerrasCandeeiros #NaturePortugal
LepidopteraOfEurope WildPortugal