Do you pay tax on airdrops?

Could you please clarify for me, do I need to pay taxes on airdrops? I've received some cryptocurrency tokens through this mechanism and I'm a bit confused about the tax implications. Is it considered taxable income? And if so, how do I calculate the amount of tax I owe? Would it be based on the value of the tokens at the time of receipt or at some other point? It would be helpful if you could provide some guidance on this matter. Thank you in advance for your assistance.