Theory:

Scene 2
Narrator: Father Wolf listened and below in the valley that ran down a little river he heard the dry, angry, whine of a tiger who has caught nothing and does not care if all the jungle knows it.

Father Wolf: The fool! To begin a night’s work with that noise! Does he think that our bucks are like his fat Waingunga bullocks?

Mother Wolf: Hush! It is neither bullock nor buck he hunts tonight. It is Man.

Narrator: The whine had changed to a sort of humming purr that seemed to come from every quarter of the compass. It was the noise that bewilders woodcutters and gypsies sleeping in the open, and makes them run sometimes into the very mouth of the tiger.

Father Wolf: Man! (Showing all his white teeth.) Hah! Are there not enough beetles that he must eat a Man, and on our ground too!
Explanation:
 
When Tabaqui left, Father Wolf listened for a sign or sound of the tiger. There was a dry, angry whine of an animal coming from the valley down below. Father Wolf recognised it to be Shere Khan's. The cry revealed that Shere Khan was quite upset and hungry and unable to catch anything for his meal. The narrator describes the cry as being so loud that the entire jungle could hear it.
 
tiger roar.jpg
The entire jungle can head Shere Khan's howl

Father Wolf was unhappy as the sound of the tiger could scare the prey away. Calling the tiger a fool, the wolf expressed his distaste and anger. He wondered how one could begin the hunt with such a loud noise as the sound could scare the prey away. Moreover, the bucks belonging to the hills were relatively fast and agile, unlike the fat bullocks from Waingunga.
 
deer-2306803_1920.jpg
The sound of the tiger could scare the animals away

Mother Wolf, on the other hand, was paying attention to Shere Khan's growl. She hushed her husband and observed that Shere Khan wasn't hunting a bullock or a buck. His growl revealed that his eyes were set on a human.
 
pexels-steve-682361.jpg
'Hush! It is Man', says Mother Wolf

The roar was so loud and intentional and was seemingly coming from every corner of the forest.
 
compass-1299559_1280.png
A compass is divided into four quarters with each representing a direction
  
One of the striking characteristics of tigers is that they make loud noises to trap people. The noise would scare people sleeping in the open. As a result, the people would run, scatter, and end up reaching the very mouth of the tiger.

Father Wolf has become uncontrollably angry! He was angry and wondered why Shere Khan should hunt a man when he could easily hunt down insects such as beetles. He was, of course, being sarcastic. The wolf despised the tiger for trying to hunt a human on their grounds.
 
Meanings of difficult words:
 
S.No
Words
Meanings
1
ValleyA low area of land between hills or mountains, typically with a river or stream flowing through it
2
BuckA male animal especially deer and antelopes
3
BullockA young bull
4
HushAsking or telling someone to be quiet
5
HummingThe act of singing with closed lips
6
Purr  A low vibrating sound (of a cat) which generally means that the animal is happy
7
Every quarter of the compassFrom all directions: east, west, north, and south; a compass is divided into four quarters with each representing a direction
8
BewilderCause someone to become confused
9
WoodcuttersA person who cuts down trees or branches, especially for fuel
10
GypsiesPeople who travel from place to place rather than living in one place
11
BeetlesAn insect with a hard covering to its body
Reference:
State Council of Educational Research and Training (2019). Term-3 English Standard-6. The Jungle Book. (pp 116 - 121). Published by the Tamil Nadu Textbook and Educational Services Corporation.