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Chelonia mydas? Quite unsure about this one, as the identifiers I usually use for turtles are not visible in the silhouette photo (beak and number of claws).

Perhaps someone can see something else? Statistically this should be a green turtle, but cannot confirm it from the photo alone.

Arachnobas is a genus of weevils peculiar to the Moluccas and New Guinea.
When caught by an animal (e.g. me), immediately this beetle turned to lay on the back and moved its legs like a spider; probably mimicry.

Genus: Arachnobas BOISDUVAL, 1835 (Syn.: Rhynchodes)
Tribus: Arachnopodini LACORDAIRE, 1866
Subfamily: Conoderinae SCHOENHERR, 1833
[det. Alexander Riedel, 2010, based on photos]

Family: Curculionidae LATREILLE, 1802 (weevils, Rüsselkäfer)
Superfamily: Curculionoidea LATREILLE, 1802
Infraorder: Cucujiformia
Suborder: Polyphaga
Order: Coleoptera (beetles, Käfer)

Indonesia, W-Papua, SW Manokwari, Arfak Mts.: Syoubrig (Mokhwam), ca. 1600m asl., 14.08.2010; IMG_4079

This nymph of a bush-cricket, ~2-3cm, looks like a giant ant (mimicry);
however, ants (Hymenoptera) neither have such - long - antennae nor such strong hind-legs (femur)!
The colouration supports the mimicry: the dark colour of antennae is interrupted by a broad white part, hence they seem to be short like the ones of ants. The same happens with the colourful neon-stripes that legs seem thin and the body seems constricted... like a real ant!

Subfamily: Phaneropterinae BURMEISTER, 1838 (false katydids)
[det. Brigitte Helfert, 2013, based on this photo]

Family: Tettigoniidae KRAUSS, 1902
(bush-crickets or katydids, Laubheuschrecken)
[det. "shadowshador", 2013, based on this photo]
Superfamily: Tettigonioidea KRAUSS, 1902
Suborder: Ensifera (crickets, katydids and bush-crickets, Langfühlerschrecken)
Order: Orthoptera (Heuschrecken & Grillen)

Infraclass: Neoptera (Neuflügler)
Subclass: Pterygota
Class: Insecta (insects, Insekten)
Subphylum: Hexapoda
Phylum: Arthropoda (Gliederfüßer)

taxonomical info: orthoptera.speciesfile.org/Common/basic/Taxa.aspx?TaxonNa...
and: www.biolib.cz/en/taxontree/id87/

Indonesia, W-Papua, vic. Manokwari: Gunung Meja (Table mountain NP), ca. 100m asl., 11.08.2010; IMG_3684

True tree-hoppers with their offspring

Order: Hemiptera (true bugs, Schnabelkerfe)
Suborder: Auchenorrhyncha
Infraorder: Cicadomorpha (Rundkopfzikaden)
Superfamily: Membracoidea
Family: Membracidae (treehoppers, Buckelzirpen oder Buckelzikaden)

Genus: Hyposolyrium SCHMIDT, 1926
possibly: Hypsolyrium uncinatum (Stäl, 1869)

host plant (I think): Solanum betaceum

Indonesia, Central-Sulawesi, Tentena-Bomba: ca. 1800m asl., 14.05.2010; IMG_9985