Hesperornis
Misc · 17 maps
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.
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.
Incubation Time
45m 27s
Elapsed Time
42m 6s
Maturation Time Left
13h 19m 39s
Time to Juvenile
42m 5s
Total Food Items
358
items
Food to Adult
234
items
Food Per Hour
49
Food Capacity
35
items
Baby Hand Feed For
28s
5.1% maturation
Cuddle Interval
0s
Imprint Per Cuddle
0%
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 adjustFood per item
50
Stack size
40
Eats at 5%
40.38 food/min
Maturation
14h 1m 45s
| Phase | Duration |  Raw Meat |
|---|---|---|
 BabyNeed this much for 5% to 10% | 42m 5s | 34 |
 JuvenileNeed this much for 10% to 50% | 5h 36m 42s | 201 |
 AdolescentNeed this much for 50% to 100% | 7h 0m 52s | 90 |
 Total | 13h 19m 39s | 325 |
WeightFeeding 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, 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 earns its keep through resource gathering, making tedious farming runs much faster. 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.