Monthly Archives: April 2014

In situ Pella is the best kind of Pella

Finally got it! Evidence of Pella planifer behaving in its natural environment.

Pella planifer investigating the vicinity of Crematogaster activity.

Pella planifer investigating the vicinity of Crematogaster activity.

We know from work conducted in the Palearctic that species of Pella hang around the nest vicinities of their host ants, preying upon weakened workers and scavenging on whatever opportunities that may arise. But these observations were geographically limited and the few Pella species of North America were a behavioral enigmas.

Based on my own previous observations, it had been becoming clear that North American Pella exhibit similar behaviors and ecologies as their Old World cousins. That’s all dandy but there is nothing that can top visual evidence to support an organism’s behavior in its native environment – today, I’ve finally accomplished this.

Pella planifer biting and tugging at a Crematogaster queen in midst of colony recruitment.

Pella planifer biting and tugging at a Crematogaster queen in midst of colony recruitment.

Crematogaster wake for spring

There’s a Crematogaster colony that lives in my backyard where I’ve periodically searched for Pella planifer. I also use the colony’s activity as a proxy for ant activity. Before I set out to go collecting, I frequently check the activity of ants in my yard in order to assess how the collecting that day is going to be.

Ants active? Great, I’ll check foraging trail periphery for Pella today.

Ants not active cause it’s too hot? Too bad, maybe I’ll put off myrmecophile collecting until fall.

It wasn’t until around 1 PM that the Crematogaster began to forage, a little chilly today. Nonetheless, decided to check out the column for Pella later in the afternoon, hoping to snap some in situ action shots of Pella destroying Crematogaster workers.

For a second there I saw a scuttle out of the corner of my eye - not Pella but a free-living athetine of some sort. Maybe Acrotona?

For a second there I saw a scuttle out of the corner of my eye – not Pella but a free-living athetine of some sort. Maybe Acrotona?

Unfortunately, it was a little too cold today and the previous night’s drop in temp. didn’t help either, oh well. Still got some interesting shots of Crematogaster workers interacting with queens that had recently dropped their flight wings. This species of Crematogaster is polygynous, not sure but I interpreted this behavior as workers trying to recruit new queens. Oddly, the queens weren’t cooperating with the workers.

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