Breeding Calculator

MISC

Hesperornis

Spawn Command

Information

Level

Preset

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Base Settings

Variant

Taming Speed

Hesperornis Egg & Breeding Calculator

The Hesperornis reproduces by laying fertilized eggs after mating. Incubation temperature must stay between 22°C and 30°C - use Air Conditioners, Standing Torches, or Dimetrodons to maintain the range. At the correct temperature, the egg hatches in approximately 1 hour and 30 minutes.

Full maturation from baby to adult takes ~1 day and 4 hours (1x rate), progressing over a lengthy period. During the baby phase (0–10%), hand-feed it directly. From 10% onward (juvenile), it can eat from a Feeding Trough.

Offspring inherit parental stats and have a small chance to mutate, gaining +2 levels in a random stat. Use the breeding calculator to plan food requirements, incubation timers, and maturation phases.

Settings

Maturation Multiplier

Egg Hatch Multiplier

Food Consume Mult.

Creature Weight

Cuddle Interval Mult.

Imprinting Mult.

Egg

Mating - 0%

45:27

The dino is inside an egg, needing specific conditions to incubate and hatch. The ideal temperature range is 22 - 30 °C.

Baby

0% - 10%

1:24:10

The hatched dinosaur, now a baby, needs constant attention and food placed directly in its inventory to survive, or a nearby Maewing to take care of its needs.

Juvenile

10% - 50%

5:36:42

The dinosaur reaches the juvenile stage, where it can now eat from a feeding trough, reducing the need for direct feeding.

Adolescent

50% - 100%

7:00:52

The dinosaur reaches the adolescent stage, becoming more independent and able to follow you while continuing to grow toward full maturity.

Raising a baby Hesperornis involves three maturation phases: Baby (0–10%) lasts ~168 min and requires constant hand-feeding. Juvenile (10–50%) spans ~11h - it can eat from a Trough now. Adolescent (50–100%) takes ~14h - continues eating from troughs, nearly fully grown.

Imprinting during maturation provides permanent stat bonuses. At 100% imprint, the Hesperornis gains 30% bonus damage and resistance when ridden by the imprinter. You'll be asked to cuddle, walk, or feed specific kibble at regular intervals during maturation.

Maturation Progress

Select Food

BabyJuvenileAdolescent

Status:

Baby

Time Left:

13:19:39

Total Time:

14:01:45

Maturation

Incubation Time

45m 27s

Elapsed Time

42m 6s

Maturation Time Left

13h 19m 39s

Time to Juvenile

42m 5s

Food

Total Food Items

358

items

Food to Adult

234

items

Food Per Hour

Food Capacity

items

Baby Hand Feed For

28s

5.1% maturation

Imprinting

Cuddle Interval

Imprint Per Cuddle

Max Imprint

0.0%

The raising calculator above shows exactly how much food you need for each maturation phase of the Hesperornis. Budget ~168 minutes for the Baby phase - this is when hand-feeding or Maewing nursing is mandatory.

Raising multiple Hesperornis simultaneously? Set the dino count and the calculator scales food requirements automatically. Different food types have different spoil timers - factor that into which food you stockpile.

Raising CalculatorFrom 5% - use slider above to adjust

Babies

Food

Food per item

Stack size

Eats at 5%

40.38 food/min

Maturation

14h 1m 45s

Phase	Duration	Raw Meat	Stacks	Weight
BabyNeed this much for 5% to 10%	42m 5s	34	1	3.4
JuvenileNeed this much for 10% to 50%	5h 36m 42s	201	6	20.1
AdolescentNeed this much for 50% to 100%	7h 0m 52s	90	3	9
Total	13h 19m 39s	325	10	32.5

Feeding Trough

2,400 items(60 slots)

Fits in one load

Tek Trough

4,000 items(100 slots)

Fits in one load

Maewing / Maeguana

300 slots

50% weight reduction on meat & berries

Baby- 2x trough refills needed (food spoils before phase ends)Juvenile- 9x trough refills needed (food spoils before phase ends)Adolescent- 11x trough refills needed (food spoils before phase ends)

Spoils in 10m|

Trough / Maewing: 40m|

Tek Trough: 16h 40m

During the Baby phase (0-10%), you must hand-feed or use a Maewing to nurse. From Juvenile (10%+), dinos can eat from a Feeding Trough on their own. Use Preserving Salt in troughs to double spoil times.

The Hesperornis is a tamable, aquatic, piscivore creature in ARK: Survival Ascended. Classified under the Misc group.

Melee starts at 100% - solid damage output that scales with level-ups. Health-wise, the Hesperornis sits at 95 base, making it very frail. With 200 base Stamina, the Hesperornis has decent staying power. A base Weight of 70 means not built for hauling.

This is a passive tame: no tranquilizers needed. Get close without startling it, then offer food from your last hotbar slot.

As a tame, the Hesperornis is well-suited for deep-sea exploration, cave diving, and ocean resource runs. Breeding produces fertilized eggs that hatch within a 22°C–30°C temperature window. Defeating one in the wild grants 0.5 base XP. It can be cloned at a Cloning Chamber for 0.25 Element plus 0.01 Element per level.

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