I think it is the Australian cockroach (Periplaneta australasiae, Blatta australasiae) but I am not sure.

you must see the adult to be sure. Please see the link.

Regards,

 Wafaa

https://www.google.com.eg/imgres?imgurl=http%3A%2F%2Fl7.alamy.com%2Fzooms%2Fafe5fa72613f4edc9f03b9f9c7710be8%2Faustralian-cockroach-periplaneta-australasiae-blatta-australasiae-f009x0.jpg&imgrefurl=http%3A%2F%2Fwww.alamy.com%2Fstock-photo%2Faustralian-cockroach-periplaneta-australasiae.html&docid=igMMeRJwdHvhcM&tbnid=U_Z-cwS1fbpViM%3A&w=640&h=447&bih=653&biw=1216&ved=0ahUKEwj7io3wgbTNAhXJB8AKHR4QD28QMwiCAShKMEo&iact=mrc&uact=8

I think it's not Periplaneta australasiae. It seems an immature specimen, making it difficult to identify.

Agreeing with that the immature specimen from a distance will not qulify best for ID, I would like to add that Periplaneta americana is recorded from the island.

Dear Jorge and Ümit, I said that you must see the adult to be sure i.e it is a nymph.The second photo is clear enough and you can enlarge it. Moreover if you open the link provided you will find the same picture that has been identified as Periplaneta australasiae and not americana, Again you must see the adult !!!

Thanks

Wafaa

I think me too that will be Perplaneta australasiae (after the small yellow spot on the nymph border sides but P.americana could be the same picture in some habitat. Anyway what is sure is that the Periplaneta genus is recorded as invasive in Indonesia likewise in all Pacific islands, Hawaii included. In the evening in Hawaii there is a mating flight of such unpleasant creatures !!

Thanks, Manole.

But for Krakatau can be brought by boats of visitors. It is not season of tourism< and I saw during two days theree boats, and what happened in two months when will starting the real crowd?

Andrey

Ya, will be not so pleasant and healthy !! Cheers

Traian

Dear Traian,

indonesian system of nature conservation is completely corrupted. E.g., they are taking 500.000 IR for ticketing but do not give you any ticket, so dividing between boat team and rangers. And 500.000 IR is about 40 USD. In all NP you arre paing for the every day of staying but the best that has state is 1-st day entrance. Other days are distributed between corrupted stuff!!!

As well for different cockroaches absolutely suitable are conditions of dirty environment that is typical for Indonesia, and NP of this country. So, if you are starting traveller I do not recommend anybody visit NP of this country. Try first Thailand.

BW Andrey

Yes, understood ! If I do that I will doing only to see Krakatau and surroundings but we take many risks I'm sure of that ! Thailand, in some places I believe it's a dream of paradise, I dream about sometimes

Cheers

Traian

So, Manole, being in Thailand contact me and I'll do excurtion for you! Just bought good diesel waggon, perfect for expeditions!

Andrey

Thanks, Andrey !

I will

OK I'll demonstrate large bastards, that appear from the water system communication in my apartment in BANGKOK... HERE THE HOUSE CONSTRUCTION IS SMWT OTHER AS EUROPEAN/

Andrey

I found a similar specimen to the one pictured in Sydney last week. Exact same markings etc. I also thought P australasiae due to the markings. A lady was about to sweep it out of the shop with her broom so i captured it for a closer look.

This looks very much like a nymph of P australasiae. They are very widespread all over Asia and on many other continents. They have no relations to ants, they just walk on the ground and the ground is usually full with ants which rule our planet...

That’s all true, Martin and Katherine!

I agree that a species discussed is like a foreigner visiting the new discovered land. But I’m not completely sure that this ant are really not incorporated in creating of preferable conditions for Pa. Esp if take into consideration the acidification of the nest by ants.. Anyway such impulse-unstable communities are studied too bad to have persuading opinion.

Andrey