Place a cage and punch it. Leave cage open and punch it go on the side that the cage is open and it will walk in and close it then place sign. You can then open it and feed it without it being able to leave. Saber & piranha is the best. Side note seemed the faster I would feed it the more it went up in taming. (Did not look at the size of the fish.

(Sorry for any grammatical errors but I’m using a translator to write this tip) the best way to tame a hesperornis is to:

- Look for one of the lowest possible level (in case you want to waste less time and less resources);

- Have the hesperornis follow you and send him into a trap made of wood or straw, formed by a foundation, 3 fances (and another one to close the cage) and a wooden ramp (to allow him to climb in);

- In case there are more hesperornis, with the same type of trap catch one of the opposite sex next to the other one already trapped (so as to have the mating bonus);

- With an ichtyornis take some fish, preferably large salmons but do not harvest the fish by the ichtyornis;

- Enter the trap with one fish and gently give it to the hesperornis (but be careful not to drop it because otherwise it will devour it and give you no taming percentage);

Repeat the steps with the ichthyornis and feed more fish to the hesperornis until it’s tame (and all this in a few minutes). I hope this tip can help someone and, in case it is useful

You can also turn the hesperornis to neutral and just throw it at dead coelacanths or salmons, instead of waiting for the hesperornis to do a dive attack to kill the fish and then wait for another dive attack to harvest the fish if its on aggressive, which saves much more time and usually grants you a golden egg every 5 minutes or so.

*Xbox One Console*

Could just be a coincidence but I had a MUCH easier time feeding this guy fish while he was swimming in the water than on land. It took a lot of back and forth but he wasn’t constantly pecking me in the face and the dead fish body wasn’t jumping in the way so that feed fish/release body wasn’t interchanging every time. I could barely approach these dudes on land because everything was working against me. I have two parasaur tames stationed parallel the water crossings with their turrets enabled so they can warn me if something nasty heads my way while I’m distracted underwater.

This is me : [×÷×]

Still on mobile

You can drag hesperornis in any water(swamp, lake, sea, pond)

On the map If you shoot them with grappling hook from crossbow. So you can drag one where there are lot of fish and trap them in cage. Also i advice you stack up some fish before you try taming one

Hear me:

I am on Ark UME(new mobile) singleplayer.

I try carrying it with grappling hook. I shoot it and it worked.

The rope of grappling hook pass through everything so i drag a hesperornis while i am at the back of the wooden cage. When it stopped walking i close the cage. I bring really big fish, the biggest i get it for was 1.8 . They say the fish blocks you to interact with hesperornis, so i tried riding a tame creature and drag the fish(a big one and i used ptenarodon) and the fish was in the feet of my pte then i try getting close to hespe in cage and see if interaction buttons shows. And it did show so it take me 5 more than 1.0 size Ssalmon to tame lvl 110. For the sabertooth salmon i got, i use (and force my self to tame a ichthyornis the annoying bastards who eats items stolen from me when they attack) the small bird common to see in the beaches to get the salmons for me. They carry the whole fish body if you order them to attack the fish and the catched fish is enhanced, you get prime fish meat from it even if it was not supposed to be. The enhanced fish gives more taming progress on hesperornis.

This here is just a mark to knew if this is my tip: [×÷×]

I don’t know what’s going on, but you cannot make a cage and trick the AI into going in the cage… that’s probably something that worked a long time ago.

🦆 Feeding Protocol – Fish on the Ground

• Kill a fish, ideally a Sabertooth Salmon (offers ~4× taming progress) or piranha (~2.4×) .

• Drop it on land near the duck—ideally in shallow water close to shore.

• The duck will waddle over and eat it. Reports say larger fish = faster taming .

• Some players use a simple trap: a 1×1 enclosure with an open side and ramp so the duck enters, then cage it, feed fish through its bars .

• Want passive fish‑hunting? Set it to aggressive/wander in water, let it kill fish and eat corpses, then move it to shore to feed .

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🌀 Temperament & Aggression

• Ducks usually ignore creatures unless you’re close or near their eggs .

• If you touch them, they’ll bite and flee—don’t shove or whack them accidentally .

• During taming, they can become hostile—sometimes glitch or wander off; best to use wander/aggro with manual fish feeding .

• Ducks may trigger aggression if eggs are nearby—players report wild ducks attacking when you loot eggs .

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✅ Summary of Best Practices

• Bring big fish (Sabertooth Salmon or piranha).

• Drop fish directly near duck; use traps if helpful.

• Use aggressive/wander behavior in water to self-feed, then bring to shore.

• Avoid touching the duck or its eggs until tame—it’ll bite!

• Keep ducks away from eggs while working with them to prevent hostility.