Tag Archives: Insects

Immature Lepidopterans

I’ve accumulated a few photographs of caterpillars and pupa in my ‘to publish’ folder for Montegraphia, so I’m putting them up now.  They’re not the greatest works, but they were all cool finds in the field.  The pupa was attached to the wall of the field station in San Ramon – there are most likely several photos floating around the Internet of this pupa given that it was pointed out to the course while at the station last winter. 

The green caterpillar was one of a few on the hiking path in Zaleski State Forest.  It was peculiar the number of caterpillars we encountered, presumably searching for a good, safe place to pupate.

The yellow caterpillar was common in Palo Verde this summer, and would inevitably be crawling down my shirt after walking through some brush.  The yellow hairs cause a rash, as shown on Mahmood’s arm, and were quite bothersome when combined with the heat, humidity and mosquitoes….

Perhaps I’ll be able to speculate on identifications after I’ve taught that section in Entomology this semester…

_1032141Camping at Zaleski State Forest - 09.04.2010 - 15.01.41Poisonous caterpillar - 06.27.2010 - 10.53.45Poisonous caterpillar - 06.27.2010 - 10.52.24

Fly predation

The flies that are commonly seen on Echinodorus flowers are attracted to white objects and, perhaps, vegetation that’s been stirred up (well, the Syrphids certainly are – their increased abundance makes their buzz is loud in area’s I had recently walked through and disturbed within the wetland).  Consequently, the flies are attracted to various white objects I’m carrying, and, occasionally one gets knocked down or otherwise temporarily incapacitated.  The brief incapacitation resulted in two predation events picture here, both within less than 5 minutes.

A group of ants and a large, surface dwelling spider prey upon flies.

Ants attacking fly - 07.07.2010 - 08.33.01

Spider consuming fly on Nymphea - 07.07.2010 - 08.37.14Ants attacking fly - 07.07.2010 - 08.32.48

Hesperiidae larval abundance

The skipper (Hesperiidae) caterpillar is again quite abundant and has nearly completely defoliated the Thalia geniculata at Palo Verde.  There are a few patches with limited herbivory, and it would be interesting to test whether those patches free of the larva were relatively small, or had reduced density or were otherwise missed by the adults when laying eggs.  I’ve collected some and hope they pupate so I can identify the adult.

Thalia skipper larvae - Hesperiidae - 09.16.2010 - 10.34.07Thalia skipper larvae - Hesperiidae - 09.16.2010 - 10.04.32Thalia skipper larvae - Hesperiidae - 09.15.2010 - 19.35.21Thalia skipper larvae - Hesperiidae - 09.16.2010 - 10.35.22

Feather feet

These tiny hempiterans are common in the wetland at Palo Verde.  There hind tarsi have expanded, feather-life, paddles that they use to provide enough surface area to jump from predators, such as myself, while on the water’s surface. I don’t know what family they are, but I’ll collect some and see if I can force the Entomology class to key them… adults are hard to find though.

In other hemipteran news, after returning from about five hours in the wetland, I wiped away something on the back of my neck, and it was a kissing bug!  It was filled with blood and unable to fly – it attempted to spread it’s wings and flutter away from the ground, but the thick, blood-filled abdomen appeared to be too heavy for lift off.  I squashed it angrily; I hope there was no chagas.

Paddling hemipteran - 09.14.2010 - 10.03.18Paddling hemipteran - 09.14.2010 - 10.03.44

Clearing the back-log: Vertebrate Zoology

As is likely the case with any photographer, I have discovered a large back-log of photographs that have yet to be processed – they lack names, tags, geographic positions, general descriptions.  And, this log has now reached over a year;  I have photos from teaching last summer’s Vertebrate Zoology lab and this Spring’s. Since I like to keep this blog as a log of my somewhat recent activities, it’s easy for these photos to pile up if I don’t immediately process and publish them.  But the other option might be to delete them… So, in an effort to process some, below are a few photos from a Spring trip to Triple Springs Creek in West Branch State Park.  I don’t even remember the student’s names…

 

Emerging stone fly - 04.27.2010 - 10.31.34

Vertebrate Zoology Triple Springs Field Trip - 04.27.2010 - 10.35.05 Mayfly larva - 04.02.2010 - 14.17.16

Vertebrate Zoology Triple Springs Field Trip - 04.27.2010 - 10.23.18