You can summon Nessie with the pennywhistle. You can lure the chupacabra (on your second visit to Puerto Rico) by herding 3 spotted goats into the area of Snaggletooth Rock (center star on the map). The farmer will prepare a trap there.
The only "monster" on Nabooti Island is a monster tortoise, which you can lure with the Opuntia Fruit (cactus fig) found on the trail at the Mountains of the Moon.
Go back to Puerto Rico, where the herder is planning to catch the chupacabra with a crate and some chains. Drive to Snaggletooth Rock (center star) and herd the three spotted goats into the grassy area with the jeep. They will lure the chupacabra. Get out and join the herder as you wait for the creature.
There was no way to see the actual monster on the Cryptids Island preview. Likewise, there is no way to see Nessie with the telescope in the actual quest. All you see is items disappearing into the water. You finally get to see the real Nessie on your second visit to Loch Ness. Having gotten a photo of some "humps" in the water, you find that they are just truck tires. But the real Nessie is a shadow in the background. After another attempt aboard the submarine, you eventually lure the creature to the surface with a pennywhistle (flute) and get its photo. (part of two long visits to Scotland in the game - see the related question)
You don't lure the goats, you lure the chupacabra withthe goats.On your first visit to Puerto Rico, get the fur from the fence at the chicken farm (right side star) and take it back for DNA testing. When you return to Puerto Rico, use the jeep to herd three spotted goats into the grass at Snaggletooth Rock (center star). They are the bait in the trap the herder has set for the chupacabra.
sirens
Sirens.
The Sirens.
Dive to the bottom of the Loch and get a picture of a colorful Nessie face. (Take it back to the pub, where you will play the original dart player again to get a pennywhistle, which can lure Nessie when you go out again, alone, in the rowboat.)
bait
A lure.
The whistle is to be used to lure the Lochness Monster and get a picture of it.
As you ride on the car, try to move the polka dot animal where the cave is and bring three.