The month that birds start singing is in March and the spring months.
Birds sing in the spring months as part of a dawn chorus which is a collective of birds chirping in the morning and the chirping or singing of the birds often is the loudest in the months of May and June.
If the weather is mild the dawn chorus or birds singing starts as early as mid March and is at it's peak in May and bird songs reach a fever pitch at daybreak.
And the dawn chorus or the birds singing continues into early summer.
The birds that start singing first in the morning are song thrushes, robins and blackbirds.
Song thrushes, robins and blackbirds start their singing when it's still dark and the air is cool.
Birds will sing in the morning to defend territory, attract mates and to raise their young.
Male birds will often sing in the morning to show that they are healthy, fit and have a good territory with lots of food available.
Most birds will start singing first in the morning or in the morning from March to July and the peak of the birds singing is in May and June.
The dawn singing chorus from birds is the loudest and the clearest during the spring breeding season.
Some other birds will also join in with the singing at dawn.
These birds that will also join in with the birds singing in the morning or at dawn include.
Wrens.
Warblers like Willow Warblers, Blackcaps, Chiffchaffs.
The song thrush bird is also known for it's many short fluty phrases which is repeated a few times after a pause.
The house sparrow is also know for it's chirp in the morning.