What is it with my compost bin and spiders? (See previous post.) I have a heavy rock on the lid, put there to discourage scavenging raccoons. I moved it (just the rock) this afternoon, and rousted out the largest red-backed jumping spider I've ever seen. And she didn't attempt to run away, but instead ran up to the top to get a good look at me.
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| The camera's flash is reflected in her eyes. And look at those shiny green fangs! |
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| Phidippus johnsoni, female. The females have the black stripe down the centre of the red-topped abdomen. Besides, she has thin pedipalps; males wear boxing gloves. |
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| Viewed from the top, her rear eyes stand atop raised peaks. There are 4 front eyes, these 2 rear ones, and 2 tiny ones on the side, barely visible here. So she can watch me from any angle. |
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| She waves those hairy, black and white pedipalps constantly. |
Beyond attracting a partner, (males) the waving of the legs and pedipalps is a primary method for communicating with other spiders, especially in territorial disputes. (Biology Insights)
So, did she think I might understand spider sign language? Or ...
While a waving motion can sometimes be a defensive posture, it’s not necessarily indicative of fear. They are more likely assessing you as a potential threat, trying to determine whether you are prey, predator, or neither. (Institute for Environmental Research and Education)
Neither predator nor prey. I left her in possession of her rock.
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Parece que a las arañas les gusta mi recipiente para compost. (Otra araña, en mayo.) Mantengo una piedra pesada encima de la tapa, con la intención de desaminar a los mapaches que antes quitaban la tapa para meterse adentro del recipiente. Esta tarde arrimé la piedra, y desperté la araña saltarína más grande que haya visto antes. Y no se asustó, no se echó a correr, sino que se subió encima de la piedra para verme mejor.
1. Se ven en sus ojos los reflejos del flash de la cámara. ¡Y mira esos quelíceros verdes tan brillantes!
2. Phidippus johnsoni, la araña de dorso rojo. Es hembra, por el centro negro del abdomen, y los pedipalpos delgados. (Los machos, parece que traen guantes de boxeo.)
3. Vistos desde arriba, los ojos traseros están elevados. Hay 4 ojos en frente, esos 2 atrás, y 2 ojitos viendo hacia ambos lados. Así que me puede estar viendo desde cualquier punto de vista.
4. Constantemente está agitando los pedipalpos.
Aparte del objeto de atraer una pareja (los machos) la agitación de las patas y los pedipalpos es una manera principal de comunicarse con otras arañas, sobre todo en disputas sobre territorios. (Biology Insights)
Entonces, ¿creía que tal vez yo comprendería la lenguaje de señales de las arañas? O ...
Mientras que el movimiento puede ser una postura defensiva, no necesariamente indica temor. Es más probable que te están evaluando, si presentas una amenaza, tratando de decidir si eres presa, depredador, o ni uno ni el otro. (Institute for Environmental Research and Education)
Bueno, yo no era presa. Ni depredadora tampoco. La dejé con la posesión libre de su piedra.





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