food could have boosted the population of those species at the expense of others. an ongoing rise in the population of great tits and blue tits, for example, could be costly for some of the birds that we don t often see in our gardens. 0ur worry as ecologists is that by providing, sort of, unlimited food for species like blue and great tits, we impact upon the species which compete with blue and great tits. so, there are two other species of tits, which many people might not have heard of. 0ne s called a marsh tit, another s called the willow tit, and both of them are amongst the fastest declining birds in the uk. and, sort of, blue and great tits are species that we call dominant species, whereas marsh and willow tits are subordinate species. so, basically in battles for food and nest sites, it s the blue and great tits that come out on top. more research is needed to understand whether and where we should be providing extra food for wild birds. in cities, for example, the lack of oth
than £250 million every year on food for our feathered friends. but there is a familiar number of resident species that eat the thousands of tons of seeds that we put out for the birds, scientists now say this constant supply of supplementary food could have boosted the population of those species at expense of others. an ongoing rise in the population of greatest hits and pollutants, for example, could be costly for some of the birds that we don t often see in our gardens. blue tits. our worry is that in providing unlimited species of food, we impact on the species that complete with blue and grey tits. there are two other species of tit many other people not have heard of, the marsh tit and willow tit, and both are among the fastest declining birds in the uk. so blue and grey tit species are biblical dominant
victoria gill reports. a welcome dose of nature on our doorsteps, window ledges and in our gardens. in the uk, we spend more than £250 million every year on food for our feathered friends but there s a limited number of familiar resident species that eat the thousands of tonnes of peanuts, seeds and suet that we put out for the birds. and scientists now say that this constant supply of supplementary food could have boosted the population of those species at the expense of others. an ongoing rise in the population of great tits and blue tits, for example, could be costly for some of the birds that we don t often see in our gardens. 0ur worry as ecologists is that by providing, sort of, unlimited food for species like blue and great tits, we impact upon the species which compete with blue and great tits. so, there are two other species of tits, which many people might not have heard of. 0ne s called a marsh tit, another s called the willow tit, and both of them are amongst
the fastest declining birds in the uk. and, sort of, blue and great tits are species that we call dominant species, whereas marsh and willow tits are subordinate species. so, basically in battles for food and nest sites, it s the blue and great tits that come out on top. more research is needed to understand whether and where we should be providing extra food for wild birds. in cities, for example, the lack of other natural food sources means that species like house sparrows have come to depend on feeders. but something these scientists say might do more ecological good is if those of us who are lucky enough to have gardens let them grow wild and plant native fruits and berries. creating our own little piece of habitat, they say, could help provide a haven for many more species than hanging out a bird feeder. victoria gill, bbc news. now it s time for a look at the weather with sarah keith lucas. good evening. the settled, dry theme
han handguns. take a listen. we should have also focus on the handgun. the numbers of those who are killed by handguns are astronomical, and if we don t start having real federal legislation matched with states and justice, we re never going to get this crisis under control. so christine, that will surely be a point of conversation today as well as the other range of tools that the president has identified to allow companies excuse me, allow communities and cities and stits s states really to focus on public safety. that includes violence prevention programs as well as summer jobs and other measures that they say have been proven to reduce crime. christine. we ll see what happens from that meeting today. we know you ll be watching it, thank you. to the situation in haiti. u.s. officials assisting in the investigation of the assassination of the haitian president arrived in the nation s capital sunday. little is known about these suspects and their motivation for the attack.