The fourth installment of rearing notes for Red Admirals (Vanessa atalanta) that we collected at Tilden Regional Park (Berkeley, CA) from 8/20-8/27. Rearing Notes and Stats 8/20/16-8/27/16: 8/27:
8/26:
8/25:
8/24:
8/23:
8/22:
8/21:
8/20:
Stats: Encounters this year:
- Brian
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Today, the first of our many tachinid fly (Tachinidae) pupariums emerged. It originally parasitized one of our Gulf Fritillaries (Augraulis vanillae). On 7/2, we found out that one of our wild caught Gulf Fritillaries was parasitized. Three maggot bit their way out of the chrysalis and pupated. They were huge pupa, quite obviously some kind of tachinid fly and not a parasitoid wasp which are often much smaller and come in huge numbers. For such a small insect, it would be logical to assume that the tachinid flies have a fast life cycle. We expected that the pupariums eclose within a week or two. But it took over one month for even one of them to emerge! We're not even sure whether the other ones are even still alive (we have gather quite a lot of them from outer wild caught chrysalises over this past month) or they really do take such a long time. After the fly emerged, we put it in the freezer. The scary part about parasitoids is that they look surprisingly similar to their non-parasitoid counterparts, just usually smaller. This tachinid fly has the same basic appearance as any other harmless fly you see around. This makes it just the more important to keep the pupa after they come out so you can see and document what they eventually become for future reference! - Brian
The second installment of our rearing notes for the Gulf Fritillary (Augraulis vannilae) from 6/28-7/12 obtained from both wild caught and captive produced eggs. Rearing Notes and Stats 6/28-7/12: 7/12:
7/11:
7/8:
7/9-10: Nothing significant worth noting. 7/7:
7/5-7/6: Nothing significant worth noting. 7/4:
7/3: Nothing significant worth noting. 7/2:
7/1:
6/30:
6/29:
6/28:
Stats: Encounters this year:
- Brian
Today we witnessed three huge tachinid fly (Tachinidae) larvae crawling out of one of a Gulf Fritillary (Augraulis vanillae) chrysalis from a wild-caught caterpillar. Virtually every species of caterpillar have natural parisitoid enemies. Some species are routinely parasitized such as Monarchs (Danaus Plexippus) with tachinoid wasps (Tachinoidae) while it can be rare in other species. For the record, we have never had any problems with wild-caught Gulf Fritillary (Augraulis vanillae) caterpillars being parasitized -- until today. Today we had the honor of witnessing three ridiculously fat maggots eating and crawling their way out of our oldest Gulf Fritillary chrysalis that pupated on 6/29. The chrysalis was made by a wild-caught caterpillar that we caught in fifth instar which we noticed was significantly smaller than the three other wild-caught fifth instars we had (so far, we don't think these three have been parasitized). Being undersized is a typical symptom of being parasitized for pretty obvious reasons -- they are being eaten alive by the parasites! After the maggots came out, they hardened into extremely round, dark brown pupariums. There are endless species of parasitoid wasps and flies (order Hymenoptera and Diptera) and it is close to impossible to identify them down to the exact genus and species until they emerge, and even then it is difficult. But we can say pretty safely that they are probably just tachinid flies since parasitoid wasps rarely get this big. When they emerge a week or so later, we will be sure to take some more pics and report back! - Brian
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Timeline 2012–2017
Albany, California This timeline is a series of daily posts recording our observations on and experiences with various insects in Albany California and surrounding areas, from 2012-2017. Since we did not publish this site until 2016, posts before that were constructed retroactively. Starting in August 2017, we moved to Ithaca, New York; posts from there on can be viewed at Timeline 2017-present: Ithaca, New York. Archives (1,011)
August 2017 (49) July 2017 (121) June 2017 (79) May 2017 (77) April 2017 (91) March 2017 (35) February 2017 (12) January 2017 (10) December 2016 (12) November 2016 (26) October 2016 (49) September 2016 (84) August 2016 (94) July 2016 (99) June 2016 (53) May 2016 (21) April 2016 (4) January 2016 (1) August 2015 (3) July 2015 (3) June 2015 (2) June 2014 (3) May 2014 (1) April 2014 (3) March 2014 (3) December 2013 (2) November 2013 (2) October 2013 (5) September 2013 (11) August 2013 (15) July 2013 (9) June 2013 (5) May 2013 (4) April 2013 (3) March 2013 (2) February 2013 (3) January 2013 (2) December 2012 (2) November 2012 (1) October 2012 (2) September 2012 (2) August 2012 (5) July 2012 (1) June 2012 (1) Authors
![]() ![]() Full Species List (Alphabetical by scientific name) Note: - Not every species we encounter is necessarily presented on this site, rather a selection of those that were of particular interest to us and that we felt were worth documenting. - We can't guarantee that all species have been identified accurately, particularly taxa we are not as familiar with. Lepidoptera Actias luna Adelpha californica Agraulis vanillae Allancastria cerisyi Antheraea mylitta Antheraea polyphemus Anthocharis sara Argema mimosae Attacus atlas Battus philenor hirsuta Bombyx mori Caligo atreus Callosamia promethea Coenonympha tullia california Citheronia regalis Cricula trifenestrata Danaus plexippus Eacles imperialis Erynnis tristis Estigmene acrea Eumorpha achemon Eupackardia calleta Furcula cinereoides Heliconius erato Heliconius hecale Heliconius sapho Heliconius sara Hyalophora cecropia Hyalophora columbia Hyalophora euryalus Hylephila phyleus Hyles lineata Junonia coenia Langia zenzeroides formosana Lophocampa maculata Manduca sexta Morpho peleides Nymphalis antiopa Orgyia vetusta Orthosia hibisci quenquefasciata Pachysphinx modesta Papilio cresphontes Papilio eurymedon Papilio glaucus Papilio machaon oregonius Papilio multicaudata Papilio polyxenes asterius Papilio rumiko Papilio rutulus Papilio zelicaon Phyciodes mylitta Phyciodes pulchella Pieris rapae Plejebus acmon Poanes melane Polites sabuleti Polygonia satyrus Pyrgus communis Rothschildia jacobaeae Samia cynthia advena Samia ricini Smerinthus cerisyi Smerinthus ophthalmica Strymon melinus Trichoplusia ni Uresephita reversalis Vanessa annabella Vanessa atalanta Vanessa cardui Unidentified Lepidoptera Hybrids Papilio glaucus × Papilio rutulus Papilio polyxenes asterius × Papilio zelicaon Orthoptera Melanoplus devastator Phaneroptera nana Pristoceuthophilus pacificus Scudderia mexicana Trimerotropis pallidipennis Phasmatodea Carausius morosus Phyllium giganteum Mantodea Mantis religiosa Phyllocrania paradoxa Hymenoptera Apis mellifera Bombus vosnesenskii Brachymeria ovata Linepithema humile Pediobius sp. Polistes dominula Xylocopa varipuncta Unidentified Diptera Lucilia sericata Unidentified Hemiptera Brochymena sp. Leptoglossus sp. Nezara viridula Odonata Argia vivida Libellula croceipennis Coleoptera Coccinella septempunctata Cycloneda polita Diabrotica undecimpunctata Hippodamia convergens Araneae (Class: Arachnida) Araneus diadematus Phidippus johnsoni |