Question

A birdwatcher sets up a night camp near a lake surrounded by trees. He is interested in finding out about bird species that are “nocturnal’. Nocturnal birds are birds that are mainly active at night. But he has no special instrument to see things in the dark.

What would be a clear indication to the birdwatcher that he should investigate if there are nocturnal species in the area?
(1 Point)

a. Sighting of crows on a few trees before 6 PM.

b. Bird calls recorded at regular intervals from 6PM to 6 AM.

c. Detection of nocturnal animals like rats from 6 PM to 6 AM.

d. Number of bird nest found using flashlights between 6 PM to 6 AM

Answer 1

b: Bird calls recorded at regular intervals from 6PM to 6AM.

Step-by-step explanation:

Nocturnal birds are mainly active at night, and one of the ways to detect their presence is by listening to their calls during the nighttime. The birdwatcher can identify if species are active at night by recording bird calls at regular intervals from 6 PM to 6 AM.

This method allows the birdwatcher to gather evidence of nocturnal bird activity without relying on visual observations, as they do not have a unique instrument to see in the dark. By listening for bird calls during the night, the birdwatcher can determine if there are nocturnal species in the area and further investigate their presence and behavior.