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Two great articals below produced by the BBC - UK., the bumble bee serves us without any reward. Bee-aware give the bumble bee some space to live.

Homing instinct of bees surprises

By Louisa Cheung

Bee numbers have been falling

Bumblebees can navigate their way home over distances of up to 13km (eight miles), a UK research team has shown.

The study also found only worker bees seemed to have this homing ability.

Bees pollinate flowering plants and therefore play a crucial role in food webs, but numbers of the insect in Britain have been declining recently.

The team said the homing research would inform conservation strategies that sought to adapt landscapes to create optimum habitats for bees.

The University of Newcastle-led group took some 100 bumblebees belonging to the common species Bombus terrestris and tagged some of them with tiny identification numbers.

The bees were then dropped in different places around north-east England and left to make their way back to the nest. The scientists set up a webcam in the hive to record the homecomers.

Smell 'maps'

Early results show the bees will fly varying distances but some that were left at a garden centre in Heddon on the Wall in the Tyne Valley - about 13km from their nest - could get home safely.

"The current scientific literature shows that bees normally forage within 5km, and this is probably correct," said Steph O'Connor, one of the researchers.

The scientists tagged some of the bees before releasing them

"What we are showing is it is eminently possible for bumblebees to forage more than 5km from the nest." Dr Mark O'Neill told the BBC News website.

Only about 20% to 30% of the tagged insects actually completed the journey. But, explained Dr O'Neill: "Don't forget that a lot of bees got killed by predators and hitting car windscreens."

It is not entirely clear how the insects navigate but their vision seems to help keep them on course and recognise landmarks.

"We believe there will be a difference, because they use vision, especially the horizon edge for guidance. So a cluttered environment is liable to be more problematic and challenging to the bees than a green field environment," said Dr O'Neill.

Action needed

The insects' "maps" also include odours, but these are limited to less than 2m (7ft). For example, when a bee has emptied the nectar in a flower, it leaves chemical "post-it notes" to tell others where it has been.

The countryside has a more varied scent composition than the urban landscape, and researchers are now plotting bee routes to see which kinds of environment the insects prefer.

The great yellow is on the UK's Biodiversity Action Plan

"We are trying to find out more about how bees forage, or look for their food," explained Dr O'Neill.

"We're particularly interested to see if they find certain environments easier to navigate."

Britain and Ireland have 25 native species of bumblebee. Five are currently listed in the UK Biodiversity Action Plan because of their precarious status: Bombus distinguendus (great yellow bumblebee); Bombus humilis (carder bumblebee); Bombus ruderatus (large garden bumblebee); Bombus subterraneus (short-haired bumblebee)Bombus sylvarum (shrill carder Bee).

Many of the other bee species have undergone major range contractions.

"We believe bees are very sensitive to having their foraging range interfered with, such as fragmentation due to housing development," said Dr O'Neill.

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Four rare types of bumblebee live in the Thames Gateway area

Wildlife experts are warning that rare species of bumblebee could face extinction if hundreds of thousands of homes are built in the Thames Gateway.

Four types of bumblebee which are among the most endangered species in the UK thrive on wild flowers in the area.

"We recognise they are rare and yet they still seem determined to build on these sites," said Ben Darvill of the Bumblebee Conservation Trust.

A government spokeswoman said building would be environmentally sustainable.

The Thames Gateway area, covering east and south-east London, and parts of Kent and Essex, is set for 120,000 new homes by 2016.

Without bumblebees you are talking about reduced crop yields and sweeping changes to the countryside

Ben Darvill

The Department for Communities and Local Government (DCLG) said 90% of development would be on previously developed land.

But Professor Ted Benton, of the University of Essex, says in his book Bumblebees that the development will be "catastrophic".

He urges the government to do more to ensure the bumblebees survive.

"As well as being very beautiful insects, they are also incredibly important pollinators of the majority of our wild flowers and a lot of our crops," said Mr Darvill.

"Without bumblebees you are talking about reduced crop yields and sweeping changes to the countryside."

Endangered species

Britain and Ireland have 25 native species of bumblebee, of which three have already become extinct nationally.

Five are listed on the UK biodiversity action plan as endangered species and four more are scheduled for inclusion

A DCLG spokeswoman said: "We need to build new homes for our ageing and growing population.

"If possible, wildlife will be reintroduced to the sites following construction and the relevant habitat checks being carried out."

But environmentalists say if the rare species lose their habitat they cannot be reintroduced at a later date.