According to reference of frog and nightingale the nightingale should be aware from frog and she should at least cross check about the frog by the animals of bog and she should not leave her own voice by coming in the influence of someone else That's all.

Be cautious of cunning people
In order to protect ourselves from cunning individuals who may try to exploit us, it is important to be vigilant and aware of their tactics. The story of "The Frog and the Nightingale" by Vikram Seth serves as a cautionary tale about the dangers of trusting the wrong people. Here are some ways to be careful of cunning individuals, with reference to the story:

Recognize their manipulative behavior
Cunning people often use manipulation and deceit to achieve their goals. In the story, the frog manipulates the nightingale by convincing her to sing for him, only to exploit her for his own gain. By recognizing the signs of manipulation, such as flattery or false promises, we can avoid falling into their traps.

Trust your instincts
In the story, the nightingale ignores her instincts and continues to sing for the frog despite feeling drained and unhappy. It is important to listen to our intuition and take action if something feels off or uncomfortable. Trusting our gut can help us avoid being taken advantage of by cunning individuals.

Set boundaries and stand up for yourself
It is crucial to establish boundaries and assert ourselves when dealing with cunning people. In the story, the nightingale is unable to stand up for herself and ultimately suffers the consequences. By setting clear boundaries and standing up for our rights, we can protect ourselves from being exploited.

Seek support from trusted individuals
If you suspect that someone is trying to manipulate or exploit you, it can be helpful to seek support from trusted friends or family members. In the story, the nightingale lacks a support system and falls victim to the frog's cunning ways. Surrounding yourself with people who have your best interests at heart can provide valuable insight and protection against cunning individuals.
By being cautious, recognizing manipulative behavior, trusting your instincts, setting boundaries, and seeking support, you can safeguard yourself from falling prey to cunning individuals like the frog in "The Frog and the Nightingale."