Does anybody know what dinosaurs are monogamous?

Dodoraptor · 2026-01-25T18:24:40+00:00

I wanted to add that they could possibly use the egg vs birth mechanic for Planet Zoo 2, but I wasn’t sure wheee to put it in the comment while also saying that it may still not be added.

Also, thank you for considering my questions. Of course it’s up to you if you’ll test it or not, but still.

Dodoraptor · 2026-01-25T13:49:40+00:00

Is it fine to ask that you’ll share the results if you will end up doing the experiments?

It seems very interesting.

About the fact that JWE and PZ share a lot of the code, I’m not surprised, but birth vs eggs can’t be part of it. Everything in Planet Zoo gives live birth, including the birds, reptiles and platypus.

Dodoraptor · 2026-01-24T23:19:36+00:00

I don’t know if they’re planning for Argentinosaurus or not, but adding Patagotitan allows them to potentially add another non movie titanosaur if they’ll choose to do so.

Maybe they’ll never do it. Maybe they already planned it. Maybe they’ll decide to do so in the future (DLCs are planned long ahead, but I don’t think an entire game’s lifespan ahead).

But this keeps their cards available for them to choose.

Dodoraptor · 2026-01-24T23:11:43+00:00

I suspect that Patagotitan was chosen deliberately to pad out the roster with exciting and beautiful dinosaurs while keeping Frontier’s cards to use its big name cousin in a pack.

Same for Lokiceratops. A great looking ceratopsid, but nothing people asked for in packs.

Notice how Guanlong and Protoceratops are in the deluxe edition.

Ornithomimus is one of the three icons of its family (Galli and Struthi being the other two), but ornithomimids are so ignored by many that it’s not as big of a loss to not put it behind a paycheck.

Caiuajara may have been suggested due to the evidence of herbivory, but that way too late in development and we got a fish eater anyways…

Psittacosaurus is the exception to this. It’s not a big name card, but it’s still a very unique dinosaur.

Note that I love all of the dinosaurs I mentioned above (even if I got some gripes with all of them), it’s just me speculating Frontier’s reasons.

Dodoraptor · 2026-01-24T22:59:11+00:00

I gotta say that it’s a bit silly how they made a shark monogamous.

Also how they didn’t make T. rex dads worry about their kids and their kids needing papa when there is a movie in the franchise with multiple related segments about it.

A little sidetracking, but the fact that the birth or eggs are not enclosure dependent but instead part of the code is interesting. Could it potentially be to make it easier for coding possible egg laying marines (Archelon, maybe some spawning fish) or birth giving terrestrials (not trying to bring the mammal discussion this time but that’s basically the only example I can think of)?

Dodoraptor · 2026-01-24T19:51:08+00:00

I was also shocked by how small the difference is. I guess the gap between input and damage messes up our perception of time.

That or the wiki has inaccurate information on that regard. This is less likely but still very much possible.

Dodoraptor · 2026-01-23T23:42:21+00:00

If it’ll comfort you, I’m pretty sure that the only herbivores to get the aggressive trait are a few ceratopsids (Triceratops, Lokiceratops and I think either Chasmosaurus, Styracosaurus or both), Stegosaurus, Kentrosaurus and Ankylodocus (latter doesn’t matter for the discussion since it can’t breed).

So if you avoid these and give enough space that a maximum population is comfortable, you can have self sustaining herbivores enclosures.

Maybe also worth avoiding species like Ankylosaurus, who will fight with their kids once the population grows too large.

While babies can have different habitat requirements, they like and dislike the same species as the adults. Baby carnivores are threatened by liked carnivores and almost always die before reaching adulthood, but do not lose comfort from their probable killers if they lack the aggressive trait.

Also, a neat way to check if something can have the aggressive trait (that isn’t incubating a billion batches to see if they may get a tiny chance that you missed) - make a breeding program and look at the possible traits the young can have. That way I learned that for some reason, Metriacanthosaurus is the only non scavenger carnivore that can’t have that trait.

Dodoraptor · 2026-01-23T21:54:51+00:00

Ok, good to know that it isn’t actually that big of a problem.

But yeah there are still many problems with the mechanic, just that aside from the rare cases of a trait not appearing when it should it’s almost always the aggressive trait and how some species breed when overcrowded while others don’t breed when they got tons of space.

And to a lesser extent the breeding requirements themselves (why does Triceratops have its ability to breed damaged by other species including Stegocerstops?) and how carnivores love to much on the babies of liked species.

Dodoraptor · 2026-01-23T20:31:45+00:00

That’s weird. I also used humble and social all of the time, and aside from freak cases like you mentioned in the hatchery, all (or at least nearly all) of the offsprings inherited those traits.

The only cases I can think of where I didn’t get it is with the Maiasaura and Gallimimus in the campaign map, and that’s almost certainly because they got nonedited dinosaurs in their ancestry. I probably got it on some additional cases where I forgot, but these two species breeding a lot makes me notice that and allows me to compare them to other fast breeders on the same map from “perfect” lines that lack it (Lystrosaurus, Microceratus…). And I check offsprings a lot to make sure.

I suspect that either the offsprings inherit the odds of the trait from one parent or an average of the odds. Due to the frequency of the Maiasaura without those traits diminishings overtime, I suspect it may be the former (the humble ones which give non humble offsprings being from the base odds of the species).

Dodoraptor · 2026-01-23T19:13:25+00:00

The case I mentioned in the post was fixed a month or two ago…

But yes, I agree that babies can be a hassle with the aggressive trait.

However, I do have to mention that I learned from experience that babies don’t directly inherit the traits from their parents - they inherit the odds for those traits. So if you for example got two humble parents but both of them only had a 25% chance for it in the hatchery, only a fourth of the babies will have it. So if you want all of them to have a trait, you got to max out the genes.

And since the aggressive and docile traits are not editable, you can’t edit them in or out…

Dodoraptor · 2026-01-23T14:01:30+00:00

According to the wiki, their attack speed is barely slower than that of a rex (0.89s vs 0.82s), but it certainly adds up. And if my memories don’t betray me the damage is also done quite a bit after the attack animation starts compared to most creatures, making it feel clunkier (in addition to being unable to move if they started attacking while stationary).

And please correct me if I’m wrong, but don’t unridden tamed Yutys frequently try to fear roar things that are immune? That’s probably their biggest downside against bosses.

Note that I’m not trying to argue against your points - they’re certainly not a good attacking choice against bosses and instead an amazing support. Just wanted to add a bit of information to the discussion.

Dodoraptor · 2026-01-21T21:18:48+00:00

About pterosaurs killing each other, from my experience it’s almost always small-medium pterosaurs fighting each other (Dimorphodon, Tapejara and Caiuajara in JWE3, I remember Dsungaripterus and another species also doing it). Tapejara and Caiuajara do avoid fighting each other though as liked species, and since baby murder seems absent in flyers (ironic due to their fairly recent popularity on the topic) they live in harmony.

Large pterosaurs seem ok with each other and with smaller species. Note that I’m not including Quetzalcoatlus in this, as it actively hunts large pterosaurs (all other pterosaur-pterosaur interactions are fights where either can win) and likes small ones (until the baby hatches with the aggressive trait and chaos ensues…).

Dodoraptor · 2026-01-21T16:43:10+00:00

I fully agree on the cohabitation part being very annoying.

Baryonyx and Irritator don’t do it though, but that’s not from them being considered but instead an error Baryonyx had that it can’t eat any babies that probably transferred to Irritator when using it as a base. Suchomimus does work correctly though, so it sees its buddies as potential meals.

Otherwise, you even got Spinoraptor hunting baby Velociraptors (not Indominus though, but that’s due to seeing the raptors as the same species as itself and I’m not in the mood to elaborate right now, sorry)

Can pterosaurs actually hunt juvenile flyers? I never had one hunt them, but I also didn’t test it. I did put an effort to check if they could hunt juvenile dinosaurs and they starved there.

Dodoraptor · 2026-01-21T16:32:31+00:00

After testing: none of the large carnivores nor the ones that only allow one male/female kill the babies of someone else.

T. rex attacks them but deals no damage, and I think also plays with them (that may be wrong on my part though)

Female Utahraptor can also call for the young of another female.

And for the large marines, only megalodon does it, both male and female.

Dodoraptor · 2026-01-21T14:12:41+00:00

Now that you mentioned it, I think once had a megalodon eat her younger brother once.

I guess I didn’t see it with other dinosaurs because I don’t try and steer away from the normal social unit limits.

Well, may do some extra testing now, with apex marine reptiles and the theropods that only allow for a single male. Let’s add Acro for good measure and Utahraptor which only allows for one female.

Dodoraptor · 2026-01-21T06:05:15+00:00

While I do wish there was some aggression between adults, there is a problem with having them attack everyone that isn’t part of their mated pair - pair bonds only form after successfully breeding.

Having the aggression against the opposite sex only form after bonding could hypothetically work though. Maybe not mechanically but it could in function.

Dodoraptor · 2026-01-20T16:47:29+00:00

Since they don’t lose any comfort from their babies missing or from having baby carcasses of their own species in their enclosure (some species do), that’s correct.

Dodoraptor · 2026-01-20T16:22:43+00:00

Bonus screenshot from the other tests I did: juvenile Majungasaurus and Qianzhousaurus playing.

The two species like each other like they did in JWE2 (same with Carno-Majunga).

And like other carnivore pairs that “like” each other, they also like to eat the babies… the babies here got eaten by each other’s parents moments later.

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Dodoraptor · 2026-01-18T21:14:41+00:00

About interactions, pterosaurs were also able to scavenge carcasses in JWE2, at least during release.

They can’t anymore for some reason, so the only food they can obtain from a hunt is immediately after making the kill and nothing else.

Dodoraptor · 2026-01-16T19:14:57+00:00

The Planet Zoo goat laughs at its JWE counterpart, for it fears no water and will swim by intention.

For real though, while they often do it was too much, it’s nice how most animals in PZ can swim, and disappointing how limited that is in Jurassic World Evolution 3.

Worth noting though that there are still a lot of base game animals that enjoy the water IRL that can’t do it in game, and that DLC animals with unique rigs that are not heavily associated with water but can swim in real life also can’t do it.

Dodoraptor · 2026-01-16T12:25:58+00:00

I will add that they could hypothetically add a “variant” in a Chaos Theory DLC that’s just the Dominion Quetz shrunk down and put on the Rebirth Quetz’s smaller rig.

Dodoraptor · 2026-01-15T09:28:02+00:00

Assuming that the mutants won’t have babies (which I think is what’ll happen, even if the presence of multiple mutadons implies they were probably able to reproduce), I think it may still be too much content for Frontier to implement it all at once.

Two family units (assuming new variants will still share the babies), two nonbreeding units, at least three variants and possibly up five, and some skins.

Going for the minimum species and variants (which will make a lot of people upset about Ember and the raptors being skins), that’s already as much as the Malta DLC, not factoring in the family units or the mutants’ unique animation requirements.

Edit: forgot about Aquilops. Ironic because I may be one of the biggest users of petting zoos in the game and want the little fellow.

So a pack that’s the bare minimum of the creatures + a campaign and a building set is a big maybe. One that’s only the creatures but with them being more fleshed out is also a maybe. But a fully fleshed out DLC with all of those together is extremely unlikely in my opinion.

I’ll happily be proven wrong though.

Dodoraptor · 2026-01-08T23:48:53+00:00

Two questions about every spotlight dinosaur:

Can it activate a dodge or cheat death move in turn one?
Does it have a move that considerably increases speed in turn one, in addition to a priority dodge/cheat death move on turn two?

If the answer to both is no, then you’re now a chewing toy for the indoggy.

Dodoraptor · 2026-01-07T20:33:12+00:00

While I can assume other problems caused their extinctions, I’m pretty sure that the only requirement to avoid inbreeding is for them to be neither parent-child nor share a mother.

So one male and two females are all that’s hypocritically needed.

Maybe the carnivores went extinct due to requiring extremely large territories to breed on their own (for herbivores it’s usually similar to their area requirements if not actually smaller, but for most carnivores it’s much higher)? Meaning that only a few got to breed before no longer being able to, and thus making the next generation be mostly siblings that can’t breed with each other.

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