This beetle "poo or lay eggs" inside this tree trunk hole. After which it used it hind legs to pat on the area. And then "poo or lay eggs" outside the hole area, and used it legs to pat on them too.

Family: Chrysomelidae (Leaf Beetle)
Subfamily:
Eumolpinae
Tribe: Eumolpini
Genus: Platycorynus
Platycorynus robustus (purple form).

https://m.singapore.biodiversity.online/species/A-Arth-Hexa-Coleoptera-000210

Thanks Dr Loongfah for ID

All Eumolpine larvae develop entirely in soil, and are root feeders. Eggs are supposed to be inserted in soil.

Looks like egg laying to me. Do you remember if the bark crevices are facing downward or not? (for the hatched larva to drop onto the soil).
This way of egg laying may be unrecorded because it seems the literature about eumolpine oviposition never mentions this.

Platycorynus tuberculatus (which is a Bornean sp). Actually all these species look quite alike, so it is not easy to tell properly from your picture (especially with distortion and color change thrown in!). But to me, it is more a robustus, rather than tuberculatus (I never find this in Singapore).

Platycorynus tuberculatus (female with tubercle) the pronotum is much more broader.

BTW, the green "Singapore" specimen of tuberculatus on this page (https://m.singapore.biodiversity.online/species/A-Arth-Hexa-Coleoptera-000211) is a wrong ID. It is an Platycorynus aureipennis (who also has tubercles but with different ridge structure on the lateral margin of elytra). When I visited NHM last year, I have corrected the ID, so Singapore don't have tuberculatus. So you see how difficult the identification is, even with specimens at hand.

Video Part 1/2:
https://www.instagram.com/reel/C5mmdcwR2EG/?igsh=MTJiZXMzeTRnM3V5ZQ==

Video Part 2/2:
https://www.instagram.com/reel/C5mnEqpRiP5/?igsh=MWs4dDF0ZDA5bjlrYw==

Video 3:
https://www.instagram.com/reel/C5mpcQARXEm/?igsh=MW5zdjlzNjc3eHZ2aA==

Could it be Acrolepiidae, Acrolepiopsis (leef moth)? Leaf miner pupa? Praydidae is another possibility for Singapore

Insects cocoon on a tree trunk.
Could it be a moth cocoon? Or some other type of Insects cocoon? Flies Cocoon cover?

Tiny size, slightly bigger than a dusty-winged lacewing. Initially thought it was dusty-winged lacewing till a close up pic show it's crochet like cocoon.

It looks like a mesh cocoon, Crochet cocoon... Top part is not closed up, bottom seems like overlapping flap.

It looks similar to Urodidae moth cocoon, but the shape and patterns look different. It's not dangling (found on tree trunk) and it's much smaller size.

Video:
1) https://www.instagram.com/reel/C5iQQAFx45R/?igsh=MXd2Mm04MWRiMjlwcw==

2) https://www.instagram.com/reel/C5lBQ3pR3y_/?igsh=MTA1NjZ6a3M0NGV3eg==

Insects

Moth

Cocoon

Crochet

Mesh

S23ultra

S23ultraphotography

Singaporebiodiversity

It seem to have "flaps" at the side of the pronotum. Orangish red. Legs are fat. Found on a type of ginger plant along with other types of Cassidinae

Family: Chrysomelidae
Subfamily: Cassidinae (Tortoise and Hispine Beetles)
Tribe: Gonophorini
Genus: Micrispa
Micrispa exigua

Thanks Dr Loongfah for ID

https://m.singapore.biodiversity.online/species/A-Arth-Hexa-Coleoptera-000298

Video:
https://www.instagram.com/reel/C5lQhlxRdFQ/?igsh=MWp5Ym5jc2JucXpzNw==

Cerambycidae (long horn beetle) found on palm leaves.
Tribe: Desmiphorini?

Likely a new record for Singapore

Same tribe as the one spotted at Lornie PCN on 15 Sept 2022
https://www.inaturalist.org/observations/135100111

However, size of this is smaller. Different colour (previous sighted has different colour at the tip)

Cerambycidae that looks like Anthicidae, ant mimicking beetle from far. Size was about the same as an Anthicidae. Pretty glossy for a Cerambycidae. Could it be mimicking ant or others?

Seem to have two spikes at the sides of pronotum, and two ridges or humps on the elytra.

21 March 2024

Video:
https://www.instagram.com/reel/C43DT22RyKa/?igsh=eWlkMWZzMm91cXQ1

Comparison pic:
https://www.instagram.com/p/C41-5h8RxO3/?igsh=eWhuNnZ1M3Fmdm03

Thanks for all the suggestions 😊😋

Butterfly eggs, Possibly Coeliadinae. Found on plant Archidendron clypearia. All hatched, one possibly parasited.

Thank Eehean for spotting them

Look like tutu quehs
Gem biscuit
And also those old school sweets
Like Maruta konpeito sweets too

Video:
https://www.instagram.com/reel/C4-Grw7R4jq/?igsh=MXZ1bzN3bnc5ZmcyYw==

Butterfly

Eggs

Coeliadinae

Marutakonpeito

Sweets

Tutuqueh

Gembiscuit

Oldschoolcandy

S23ultra

S23ultraphotography

Singaporebiodiversity

Family: Chrysomelidae
Subfamily: Cryptocephalinae:
Genus Chlamisus (Cloaked Warty Leaf Beetles)
Possibly Chlamisus malayana (formerly known as Exema malayana).

Thanks Dr Loongfah for ID:
Possibly Chlamisus malayana (formerly known as Exema malayana). Species of this genus all look similar; you have to see the tubercles and ridges on the elytra and prothorax respectively.

Other info:
Mimicking caterpillar poop frass.
Can read this article for more info: https://beetlesinthebush.com/tag/warty-leaf-beetle/

Dr Loongfah:
Not a lot is known about the habit of this type of Chrysomelid (Cryptocephalinae, Tribe Chlamisini). I believe it might be constructing the faecal cases of its eggs; can you see it attaching plant hairs to the case?

OBSERVATION:
It was laying egg or maybe constructing the faecal cases of it's egg. It rotated the egg case as it did that. When the beetle was sighted, egg case was about 3/4 completed. Can see the short secretory stalk to the food plant, from the bottom of the egg case.

About 6-10 mins later (not sure if my time estimate was right), it gave a finish to the top of the egg case, like a finish or topping. It used it's legs to push the egg case to stand on the leaf, making sure it's attached to the leaf and moved on. The egg looked like there are "spikes" or extra flaps on it.

Egg is slightly light caramel brown at this time. It turned dark brown afterwards, secured to the stem of vein of the leaf. It look like a dot and not possible to know it's an egg case without close up examination. Caterpillar frass are much bigger in size. There seem to be some fine hair or long stripes stuff on it.

Sadly, the adult flew off... Not able to observe any further.

Size of egg case is about 1/4 of the adult beetle size. Initially, thought that was the beetle's eyes and thought it could be eating something (mistaken the butt for it's head).

The adult are usually found on the top young leaves, resting on the leaf, looking like a poop or caterpillar frass. Normally, found one single adult.

Host plant, last pic:
Maybe Aporosa frutescens
Thanks Eehean for ID

Video of it laying egg or constructing the faecal cases of it's egg:
Part 1/3:
https://www.instagram.com/reel/C40Wh3pxT_I/?igsh=bjE4ZXJtanA1bGp4

Part 2/3:
https://www.instagram.com/reel/C40XVM2xDXW/?igsh=cWhtOWhtaHEwNDEw

Part 3/3:
https://www.instagram.com/reel/C40XgvpxWjz/?igsh=bno2M3BsaGZ2Mm80

Pdf information:
The faecal cases of many chlamisine eggs are bell-shaped and have a rough unstructured surface (Figure 16/16, 17). It seems that the female produces shapeless faeces rather than preformed faecal plates (see Le Sage, 1982, 1984a). However, Karren (1964) observed the formation of faecal plates in Exema pennsylvanica Pierce. These plates each have a longitudinal keel which is used by the female for orientation when arranging the next row of plates.

As a rule the front pole of the egg-case is closed by spreading excrement across it. In Megalostomis gazella, however, the female places a faecal plug over it (The seal at the front pole of Exema eggs lies
rather deeper within the envelope, so that it is surrounded by a kind of flange.

The Chlamisinae attach their eggs with a short secretory stalk to the food plant (Karren, 1964; Le Sage, 1982) (Figures 16116 & 17

Wasp. All black
Seem to have two diagonal gold smooth stripes. Slightly concave between the eyes.

Inaturalist suggest Chalcidoidea (Chalcidoid Wasps)

Thanks Jeong yoo:
Beautiful Perilampus! It’s most likely P. orientalis. Do you have the specimen with you?

Family: Perilampidae
Subfamily: Perilampinae
Genus: Perilampus
Most likely Perilampus orientalis

The Perilampidae are a small family within the Chalcidoidea, composed mostly of hyperparasitoids. The family is closely related to the Eucharitidae, and the eucharitids appear to have evolved from within the Perilampidae, thus rendering the family paraphyletic (if the two families are joined in the future, the name with precedence is Eucharitidae)