adventures in nature

2015 Oct 11 – the voles are back! (and a tropical kingbird)

We are seeing quite a bit of vole sign once again in the Bay Area, which is a good for most animals around here, except of course for the voles, really – they are one of the top items on the menu for many many animals. It’s interesting that they’ve rebounded right now in the worst part of the drought here in California. We noticed a severe drop in their numbers about two or three years ago (which is a normal part of their cycle), but it’s a good sign that they’ve returned. Now we just need some water.

These small rodents that resemble mice move mostly above ground, and they tend to create “runs” as they utilize the same pathways over and over. These runs create little tunnels in the grass and sometimes recessed runways in the ground.

a “vole’s-eye view” of a vole tunnel in the grass / Sonoma County CA

overhead view of vole grass tunnel or “run” (on right), clear area on left has vole scats

vole scats

re-purposed gopher hole – voles have excavated this old gopher hole to use as shelter

There seems to be a very marked decrease in the frequency of raptor sightings the last two years in this area, by my observation – and though it’s difficult to determine why this might be, certainly the vole population crash coupled with the severe drought must be a one-two punch that all predators on the landscape are experiencing.

Bring on the rains, el Nino!!!

We also saw a Tropical Kingbird today, which is a very rare visitor to this area (a type of flycatcher). The pictures were taken through a lot of fog, but we had good views of the bird hunting and perched for five minutes at least. Our friend Moss made the ID, based on the notched tail (differentiating it from a Western Kingbird). Nice sighting!

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