Friday, September 02, 2022

Cat on a peeling tree

 A long, long way from home. A cabbage white butterfly caterpillar* hikes down the old arbutus tree, looking for a green shelter where he can build his chrysalis.

Cabbage white, Pieris rapae, heading down.

It's a barren desert up here.

He has grown fat eating arbutus leaves far above, but the tree is no place to settle while he turns into a butterfly. Nothing on an arbutus is permanent, neither the leaves nor the bark, nor even the inner bark.

A stretch of the tree in question.

The bark peels off in two stages; first, the dark brown outer bark, then the inner layer, smooth reddish bark. The layer underneath, which will turn red and peel off in time, is greenish, and even photosynthesizes like the leaves do.

*UPDATE: The caterpillar has been re-identified as the larva of a White-dotted Prominent moth, Nadata gibbosa.
~~~~~~~~~~~~~~~~~~~~~~~~~~~~
Está muy lejos de casa, esta oruguita. Una oruga de la blanquita de la col, Pieris rapae,** haciendo el largo peregrinaje desde lo alto del árbol, buscando un sitio verde para formar su crisálida.

Fotos: La oruga en la corteza del Arbutus. Y un tramo del árbol.

La oruga ha crecido comiendo hojas allá arriba, pero este árbol no es un lugar adecuado para fijarse mientras se transforma en mariposa. Nada en este árbol es permanente, ni las hojas, ni la corteza, ni aun la corteza interior.

La corteza se desprende en dos etapas: primero la corteza exterior, de un café oscuro, fragmentado ya. Luego, en grandes hojuelas, la corteza interior, ésta lisa, con la textura de seda, y de un color rojizo. La capa que se descubre entonces, la cual también en su turno se volverá rojo y se desprenderá, ahora es algo verde, y hasta hace fotosíntesis al igual que las hojas.

** Se ha identificado la larva ahora como la de la mariposa nocturna Nadata gibbosa.

No comments:

Post a Comment

I'm having to moderate all comments because Blogger seems to have a problem notifying me. Sorry about that. I will review them several times daily, though, until this issue is fixed.

Also, I have word verification on, because I found out that not only do I get spam without it, but it gets passed on to anyone commenting in that thread. Not cool!

Powered By Blogger