Birds are a crucial part of the ecosystem and some of them are popularly known for their voices. We know that birds sing in the daytime but many of them prefer to sing at night. From the haunting cry ...
12don MSN
What makes mountain birds sing at dawn—and why are they sometimes quiet? Ecologists explain
Three species of the melodic African warbler bird refuse to get up early and sing their customary daybreak songs when the ...
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