Find all animals, to get the 13th animal

Question

The following 12 animals are hidden in this word search puzzle. Each of them gives a letter, which is needed for the 13th animal.

• Elephant
• Anaconda
• Eagle
• Rattlesnake
• Vulture
• Owl
• Reindeer
• Mongoose
• Serpent
• Boa Constrictor
• Hedgehog
• Buzzard

Some hints where to look for the missing letter:

1. For the mammals, it's in the heart
2. For the raptors, it's where the claws are
3. For the snakes, it's at the tail

    A N O M E H E K A N S O S L
    I E P G M P E N T P E L W B
    R O O S E R D E P O O T P N
    O V N U R I O E S E A T A R
    T M U T B E R N O N D O G H
    C P N L S U P E C R E E T H
    I E A H T B Z U A S L E G D
    R A E T M O V Z N G S A P R
    T S N O C A R U A S E N U R

Answer 1

The 13th animal is a

hippopotamus

In the grid, in orange, the mammals can be found using

a horse jump pattern as in chess. The letters in the hearth of the eight letter horse jump are the ones we need.

The raptors, marked in purple

are in a V-shape, as in flight. The letters at the bottom of the V-shape, the claws of the vultures are the ones we need

The snakes, marked in green

follow a snake pattern through the grid. The letters we need are at the tail of the snake patterns

This gives the following letters (in order the animals are given)

AOSHMPOPPITU

This is an anagram for

HIPPOPOTAMUS

The full grid: