Sunday, October 23, 2022

Bigfoot

 This little shivering beastie sat on the footpath beside the river, hunkered down, trying to be inconspicuous.

Vole

He didn't move when we bent down to look at him. Maybe he shivered a bit, frightened. We were big and dangerous, but he froze, like a baby deer, trying to become invisible.

But he was in the wrong place; a woman pounded by, running. There would be others. Someone was sure to step on him, unaware. Carefully, my friend moved him off the path, covered him with a big dead leaf for protection against predatory birds. He barely moved, except to look at us.

Such cute ears!

We wondered if he had been injured, but saw no break in the fur, no obvious deformity. Just that trembly stillness.

What is he? My friends called him a vole, and these are also known as meadow or field mice. I looked for photos to help with identification. On Wikipedia, a list of "Mammals of British Columbia" includes 11 species of vole, as well as a few mice among the Cricetidae. Asking for voles of Vancouver Island brings up Townsend's vole, but the description doesn't fit: small ears, large vole, dark brown.

Further browsing led me to E-Fauna BC's Nature Notes, and an article by Hugh Griffiths.

One of the key ways of distinguishing among species of vole is, again, measuring them. One of the required measurements is of the hind foot. Nobody makes tiny vole-sized versions of those antique-looking devices for human foot-measuring found lying abandoned under benches in shoe stores.

Never thought to measure those big feet while we had the chance!

~~~~~~~~~~~~~~~~~~~~~~~~~~

Encontramos este animalito en el sendero a la orilla del rio, encogido, tremblando, como si quisiera ser invisible.

Fotos: un topillo.

No se movió cuando nos agachamos a verlo más de cerca. Tal vez temblaba de miedo. Éramos grandes y peligrosos, pero se quedó inmóvil como un venadito tratando de pasar inadvertido.

Pero estaba en un lugar inseguro. Pasó corriendo una mujer, ojos al frente. Habrán más. Alguien lo pisotearía sin haberlo visto. Con mucho cuidado, mi amiga lo arrimó al borde del sendero, y lo cubrió con una hoja muerta para prevenir contra cuervos y otros predadores volantes. Apenas se movió, hasta con esto, aparte de volver la cabeza un poco para mirarnos.

¿Estaría herido? No vimos señales de esto. Solamente esa inmovilidad, esos ojos espantados.

¿Qué tipo de animal sería? Mi amiga lo llamó un topillo; estos también se conocen como ratones de campo. Busqué en el web por fotos que ayudarían con una identificación. En Wikipedia, una lista de "mamíferos de Columbia Británica" enumera 11 especies de topillo, y varios en la misma famila, los Cricetidae. Al limitar la búsqueda a topillos de la isla de Vancouver, salió el topillo de Townsend, pero la descripción que dan no corresponde: orejas chicas, topillo grande, de color café oscuro.

Seguí buscando. Encontré un artículo en E-Fauna, BC, por Hugh Griffiths.

"Una de las maneras claves de distinguir entre especies de topillo es, otra vez, midiéndolos. Una de las medidas requiridas es la del tamaño de las patas posteriores. Nadie hace versiones del tamaño de los topillos de esos aparatos que servían para medir los pies humanos, y que se encontraban antaño abandonados bajo los bancos en tiendas de zapatos."

No se me ocurrió medir esas patas grandes cuando se me ofreció la oportunidad.

2 comments:

  1. My understanding is that voles have tails much shorter than the length of their bodies. They also have small ears and small eyes and are more round-looking overall than this. The two-toned tail (dark above, light below) is significant as well. In NJ it would make it one of the deermice, and looking at my Kaufman's Mammals that seems to hold true for BC as well. This is much greyer than our New Jersey mice, which makes me suspect the larger northwestern deermouse, but I have trouble even getting my own mice to species. Notice, too that your guy has a white belly (you can see it at the top of his rear leg), that's normal for mice and not for voles.

    ReplyDelete
  2. Thanks! Over on Field Naturalists of BC, it's been called a deer mouse or a Keen's mouse, both on that same list of Cricetidae. I hadn't noticed the two-toned tail; thanks for drawing my attention to it.

    ReplyDelete

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