The District of Nainital is blessed with all types of zones responsible for the growth of diverse flora and fauna in the area. The area has different varieties of soil for different plantations. The deep valleys of Nainital having an elevation up to 1000 meters providing an ideal climate for growing plants of both hilly areas and the plains.
The dense forests is a habitat for a large number of animals like the Himalayan languor, Indian porcupine, wild pig, monkey, barking deer, black capped marten, gural, and brown flying squirrel.
One can also hear the humming of a large number of birds in these forests. Some of them are jungle crow, streaked laughing thrush, grey winged black bird, house sparrow, the Himalayan tree creeper, house crow, green backed tit.
Nainital lakes are inhabited with a variety of fishes commonly known as carps. There are both major and minor carps. The major ones have three classes, mahaseer, hill trout (commonly known as asela or rasela), and mirror carp. The carps are bred on a large scale in Nainital.
The place also has grooves of Kaphal, Sal ,Oak, Pine, and Buruns trees that are as tall as 6000 ft. At much higher altitudes, Deodar and Surai trees are a common sight.
For flora lovers, some of the important trees and bushes growing in the woods are Panger, Akhrot, Hill Pipal, Chinar, Angu, Kilmora, Kunj, Hisalu, Weeping Willow, and Pine. Especially in the Bhabhar region, one can see Babul and Kikar trees in abundance apart from Sal, Shisham, and Khair.
Nainital takes horticulture on a big way. It is one of the major fruit growing districts of the country. A large portion of the land is converted into orchards for growing peaches, pears, apricots, kafals, strawberries, etc. Apple orchards, a prime attraction, are found along the Ramgarh and Mukteshwar belt. Lichis that grow in the Ramnagar area are quite famous.
Floriculture is also coming up in on a large scale due to the favourable climate for growing flowers. Besides, tea plantations are also growing in number on the slopes of Niglat & Ghorakhal.
In the Tarai and Bhabhar belt, a number of plants having medicinal value grow. For example, herbs like Ashok, Bhringraj, Bhilwa, Varun, and Gambhari.
Under-the-water life of the district is equally enchanting. Some of the aquatic species living in these waters are potomageton pectinatus, potomageton crispus, polygonum glabrum, holygonum amphibium, and hydrilla verticellata