We stand at the window. Watching. Waiting. It’s been the same story for around 20 years, taking part in the RSPB’s Big Garden Birdwatch. Every year, on the last weekend in January, faithfully recording the birds that visit our garden. Our findings, and the records of tens of thousands of other participants up and down the country, are combined by the boffins at the Royal Society for the Protection of Birds. They use the data to work out which species are doing well and which are doing badly, and then look for the reasons why. It’s said to be one of the largest “citizen science” exercises in the world, and it’s always been a pleasure to be part of it.

But this year it’s different. You see, birds don’t come here any more.

Of course, birds have never flocked to our garden in large numbers. We live on a suburban estate, several hundred metres from open country. Our garden is small, although a well-stocked bird table and a bird bath are provided to attract visitors, and several large bushes offer them security and shelter.

Despite the limitations of our garden, in the past we have logged a number of species during the allotted Birdwatch hour. They include house sparrow, dunnock, blackbird, robin, wren, starling, magpie, blue tit and woodpigeon. One year – our very own annus mirabilis – a grey wagtail dropped in to say hi.

This year, in two full days of monitoring the garden, we see just one bird! A solitary male blackbird comes to the bird table a couple of times, but doesn’t stay long. Other than him, our garden is an avian desert throughout the entire Birdwatch weekend.

I am reminded of the seminal 1962 book, Silent Spring, in which Rachel Carson wrote of the impact of the indiscriminate use of pesticides – in particular DDT – on bird numbers in the US. I don’t know what impact – if any – pesticides in the local environment may have had on the disappearance of birds from our garden. There are a number of other possible culprits also in the frame, including habitat loss, new agricultural practices, environmental pollution and human-generated climate change.

Yes, it’s complex, but there’s no excuse for inaction. Carson was writing nearly 50 years ago and society is now much better placed to understand the environmental impact of its actions. Yet the birds continue to disappear, from our back garden and from towns and countryside throughout the UK.

It cannot – must not – be allowed to continue.

The solutions will not be simple. That much is certain. Also certain is the fact that we – humans – are at the root of this. If we are the problem then we must also become the solution. The clock is ticking, the birds are dying.

Rachel Carson put it like this:

We stand now where two roads diverge. But unlike the roads in Robert Frost’s familiar poem, they are not equally fair. The road we have long been traveling is deceptively easy, a smooth superhighway on which we progress with great speed, but at its end lies disaster. The other fork of the road — the one less traveled by — offers our last, our only chance to reach a destination that assures the preservation of the earth.

Rachel Carson: Silent Spring

In January 2021 the RSPB will doubtless run another Big Garden Birdwatch, but I don’t know if we’ll take part again. You see, birds don’t come here any more.