The Big Garden Birdwatch is organised every year by the Royal Society for the Protection of Birds（RSPB）.It is a chance for people to record the birds that visit their garden，or local green space.Nearly 700，000 people have taken part in the world's largest wildlife survey since it started in 1979.They have provided valuable information of how different types of birds are doing，and whether their populations are going up or down.
More than 11 million birds were counted in 2022.The house sparrow（麻雀） was the most commonly seen garden bird.But its numbers were lower than in 2021.However，there was a rise in greenfinch numbers.Hopefully，the birds may be recovering（恢复） from a big drop in the population over the last 30 years.
Almost 60，000 schoolchildren took part in the survey，and that included spending an hour in nature counting different types of birds.Wood pigeons（鸽子） were the most commonly seen by schools.Blackbirds came a close second.
"It's been exciting to see so many people taking part this year，"said Rebecca Speight，an officer of the RSPB."Spring is a great time to watch and reconnect with birds.It sees the return of nature's biggest music festival.Open your back door，a window or simply step outside and listen."
