Wile E.'s

  

These are somewhat distant views (the photos are heavily cropped), but it was interesting to watch a group of three coyotes in a salt marsh at Point Reyes recently.  I appreciated the way their fur matched the fall colors of the marsh. Were they hunting small mammals during the flood tide?  Ducks?

Watching the rain?

 

Coyote at the edge of a marsh in Scituate, Massachusetts, 11 December 2023

California and Connemara

The other day we were watching a coyote hunting — walking, pausing, listening intently:

 

 

 

It was late in the afternoon, so the lighting brought out the different colors in the coyote's fur:

 

 

 

Afterwards, I kept pondering what colors were there.  How would you describe them?

 

Later that night I was reading a book I started recently (Listening to the Wind by Tim Robinson) and I came across a line that strung together these colors — "tawny, amber, and rufous."  Tim was describing sedges in a bog, but it immediately made me think about this coyote and I thought, "That's it!  Those are the colors in the coyote's fur."

 

A fun connection between a coyote in California and a bog in Connemara.

 

P.S.  Connemara is on the west coast of Ireland in the northwest corner of County Galway.

 

Out in the rain

We were on our way to work yesterday (15 December 2018) when we noticed a couple of animals out in the rain:

 

Coyote (Canis latrans) on a dune ridge.

 

Burrowing Owl (Athene cunicularia) in the grassland.

Looks like we've received a little over an inch of rain during the last two days.

 

Scavenging

Sometimes you hear about mammalian scavengers feeding on marine mammal carcasses washed ashore, but I hadn't seen it myself until this past weekend.  

Joe stopped by to mention that he had just seen a coyote feeding on a seal.  Luckily, I had my large zoom lens on my camera at the time.  

I managed a few distant photographs, so here's one for the record:

 

Coyote (Canis latrans) feeding on a Harbor Seal (Phoca vitulina) carcass, 15 July 2018

P.S.  Many thanks to Joe for the wildlife alert! 

ADDENDUM (18 July 2018): KB asked if the coyote was hit by any waves.  Since you asked, the answer is:

Yes!

 

Although the coyote didn't seem to mind slightly wet feet:

 

Peering out

 

Young coyote on Bodega Head, 21 July 2016

P.S.  For more coyote pictures, check out previous posts — "Caught napping" on 9 August 2014 and "Pounce!" on 7 October 2012.

 

Caught napping

 

I was surprised to see this Coyote sprawled out on the sand today.  A late morning nap?

It awoke briefly and raised its head to look around.  This next view made me appreciate the size of its ears (and made me think of Yoda!).

The Coyote looked right and left, and then went back to sleep.  (All of these pictures were taken from far away with a zoom lens and then cropped to show closer views.)

 

 

 

"Sleepy I am."

Home sweet scat

In late August, Lewis and I encountered some coyote scat in the dunes with sandy tubes growing out of it.  Some of the tubes extended into the air (see below):

 

While on other pieces of scat, some of the tubes extended below ground (next picture, after tubes were exposed):

 

Neither of us recalled seeing tubes like this before and we were puzzled about what might be responsible for the tubes.  Was it a fungus?  Was it an insect?  We really didn't know what the possibilities were.

 

We decided to open a couple of the tubes to see if there were any clues inside.  First we discovered that the sandy tubes were bound by silk...and then Lewis found one of these (next picture)!

 

And after looking around a little more, we found a few dried, empty cases at the ends of several tubes.  The cases looked like this:

 

Well, we were pretty sure that the larvae Lewis found had made the tubes, but we didn't know what type of insect they were...and we didn't know if they were connected to the empty cases at the ends of the tubes.

We came back and did some research in books and online, but couldn't find any information about these mysterious insect larvae that built sand tubes in coyote scat.

So we decided the only way to possibly figure out what they were was to try to raise them.  We set up a small terrarium with sand and placed one scat with tubes in it and monitored it.  (Yes, most of our co-workers thought we were a little crazy!) 

The larvae were active and continued building their tubes.  Some approached the side of the terrarium where we could then see dense patches of silk.  Time went by, and at the end of September no adults had emerged.  We were starting to wonder if they ever would, and then on 1 October Lewis spotted an adult on the roof of the terrarium!

Here's what he saw:

 

 

They were moths!  This is Tinea occidentella.  It turns out that its caterpillars are known for feeding on coyote scat!

It's a very handsome moth.  Here are a few close-ups to highlight several features.  

One of my favorites was the white "pom-pom" on its head.  It's formally called a white head vestiture and is quite striking when photographed under a microscope!

 

Note the gold-flecked scales behind the head.

 

And the beautiful pewter-colored scales along the back:

 

We confirmed that the pupal cases we observed in the field belonged to this moth.  Here is one we found in the terrarium from which this moth likely emerged:

 

Notice that the adult moth left behind a few scales in the pupal case when it emerged.  The scales are triangular and look a bit like miniature gray gingko leaves.

 

I was wondering how the pupae got to the end of the tubes, and learned that in this family of moths the pupae are mobile!  They wriggle to the tips of the tubes just before they're ready to emerge as adults. 

Before this encounter, I had no idea there were moth caterpillars that fed on mammal scat.  But Powell and Opler (2009) provide an interesting description of larval foods in this family of moths: 

"Tineids do not feed on flowering plants, although one genus in the Palearctic mines in ferns; mostly they are generalist detritivores or fungivores, with a wide range of biologies — from feeding on vegetable refuse, guano in bat caves, and detritus in spider webs to specialists on animal products such as scats, owl pellets, or feathers — some are capable of digesting wool, including several cosmopolitan species that feed on woolen clothes..."

And about Tinea occidentella specifically:

"The larvae live on natural keratinous materials such as feathers of bird carcasses and coyote scats." [They also found them infesting owl pellets.]

P.S.  Part way through this mystery we received assistance from several scientists at UC Davis' Bohart Museum of Entomology regarding the identity of the caterpillar for which we are extremely grateful!

Pounce!

On 6 October 2012, I came upon a Coyote (Canis latrans) hunting along the side of the road.  Although more common elsewhere, sightings of Coyotes have only recently become regular on Bodega Head.  I've received many different reports of them during the last few months, but it took a while for me to catch up with one when I had a camera nearby.

Here are a few still shots.  Note the lanky appearance and overall reddish blonde coloration.  Coyotes are much larger than foxes, weighing 20-50 pounds compared to the 6.5-15 pounds of a Gray Fox.

 

The long, pointed nose is distinctive.

 

The tail has a black tip and a black spot near the base (see below).  Coyotes often run with their tails down, while foxes hold their tails up.  The ears are large, with reddish fur behind.

 

To compare with the other local canid, review the post about Gray Foxes from 10 September 2012. 

 

And here's a short video showing a sequence of photos when the Coyote became alert to possible prey, stalked closer, sat back on its hindlegs, and then pounced!  [Video is best when viewed at smaller size.]