Bat strafes owl

It's not unusual for a bat to glean insects buzzing a mammal.

Occasionally fellow camera trappers in Minnesota photograph bats very close to deer covered with mosquitos, and it's obvious what the bats are doing.

What you see in this video clip however is a little odd.

The pools in this creek are swarming with insects, so there's no reason for the bat, probably a species of Myotis, to hit the owl in the head.

That is, unless something else is going on.

Could the bat be mobbing the owl, the way songbirds mob owls?

Or did it's radar fail?

This is the kind of footage that reinforces my obsession with camera trapping.

If you are curious about nature, get yourself a camera trap.

You'll learn a lot while you are having fun.

Bears vs. the Squeaker

More bears from the pools of the seasonal creek.

I thought the jury-rigged squeaker might lead to the design of an effective bear deterrent.

Watch the video and learn what I learned.

PS: Just back from a pleasant week with camera trappers at the Sierra Nevada Field Campus. More on that later.

A modest bear

I have had to forego the pleasures of the blogosphere for the past 2 months because other duties have called.

I am now getting back into the blogging groove and have been busy finishing off preparation for the camera trapping workshop, which is next week.

I've also been plowing through a huge backlog of video clips, and couldn't resist posting this little sequence to YouTube.

It's part of a recent camera trapping story and lessons learned from Mother Nature . . .  I'll cover it all in the workshop.

Cub See, Cub Do

Brownie approaches a cam on a deer trail.
The white upper edge is spider web on the
spikes of the camera's bear guard.

Brownie is interested in cameras. Deconstructing cameras.

She took out four cams in the past month.

Here she perched on a log and peered at the mysterious source of wonderment before starting work.

She sniffed at it, tried to mouth it, and managed to dislodge it even though it was equipped with a spiked bear guard.

When she was finished the camera was 30 feet away.

It took ten minutes to find it, and I was one worried and sweaty codger in the interim.

The pictures told the same old story: bear finds camera, bear examines camera, etc.

Brownie seemed to be a lone agent.

But yesterday I collected the card from another camera (the "ringtail cam"), and discovered that Brownie has two apprentices.  

The clips could be better, but you can still see that one of the understudies is learning the trade well.

Ringtail on the beat

Here's some night action on a seasonal creek in Butte County, California.

Gray foxes, striped skunks, and raccoons use the creek bed as a thoroughfare, and are the most frequently filmed camera-trapped visitors.

Bears and bobcats stop to drink and then cross it and move on up the slope.

When I get better video of these common visitors I will post it.

This is the only footage of a ringtail I've gotten on this creek, but it is one of the more satisfying clips.

This ringtail didn't want to get its feet wet, unlike its relative the raccoon with its underwater hand-jive routine.

As you can see, it's a good rock-hopper.

In the family way

We're hoping this badger is in the family way, and we can't even prove it's a she-badger.

But she looks feminine, and she is doing all the right things. 



She's spending an awful lot of time in this one burrow at the Chimineas Ranch, and the burrow has a huge tailing of fresh dirt.

And it's baby-badger-time-of-year. They give birth in March and April.

With the help of our trusty friend Craig, and his assistants, RandomTruth and I spent a few days at the ranch last month setting cams at carnivore dens.

At this promising den I set a Sony s600 for stills, and a Bushnell Trophy for videos of playful badger babies.

Regrettably, the Trophy can't be set for night time only, so there's been a flurry of false triggers in the heat of the day.

Craig, our good man in Chimineas has been cleaning the lenses and checking the memory cards.

Here's his most recent message.

"It seems that the badger shots decreased quite a lot over the course of the month.  I'm hoping it's because she had youngsters. 

As the badger usage decreased, Heermann's kangaroo rat visitation increased.  There are many shots of them bouncing around the entrance to the den. 

When I reset the camera, I saw that there was a rodent hole just above the badger den.  It seems unwise for a fossorial small mammal to have a den next to a badger den, but kangaroo rats were never known for their smarts.  

Raccoons visited the den and sniffed around a few times over the course of the set.  I still think that the badger is using this den."  

Knock on wood, my friends.

Let us hope the blessed event has transpired and that mom is blissfully nursing her litter.

Going for shrew and bagging shrew

A chance encounter between two Trowbridge shrews (tentative id) 

Humbolt County, April 2013:


Question: Why don't camera trappers photograph more shrews?

Answer:  They aren't looking for schtinkin' shrews, because they aren't interested in shrews.

Who cares about little tiny ferocious mammals that eat 1.5 times their own weight a day in insects, spiders, centipedes, and worms?

Shrews may be one of the most abundant predators in woodland habitats, but it's their small size that makes them hard to photograph.

Camera trappers focus on the larger animals they know, and when camera traps are set for larger species shrews are usually undetectable.

Shrews live in a different time-space continuum, and I've photographed only a few by mistake.

They are usually a speck in the overall image, often partially hidden in leaf litter, and they are hard to identify. That's why most good pictures of shrews are nature-faked.

But they are intriguing subjects, and a few months ago I set a camera specifically for shrews.

I knew it might be a waste of time, but I staked the camera close to a rotting redwood log, and clawed away the surface litter, thinking the disturbance might attract a hungry shrew.

The batteries lasted 70 days, and there were 83 photos.

But only three pictures were of animals, and as far as I can tell, all were Trowbridge shrews with bald tails [yes, older shrews can lose their bicolored tail pattern to baldness].

The surprise was a pair of shrews having an altercation.

Going for shrew and bagging shrew may have been a stroke of good luck.

I'll have to repeat the exercise several more times to convince myself that I really know how to hunt shrew.