The images from the natural world by green yatra, Observing nature can be done just about anywhere and just about any time. A variety of birds, insects and reptiles can be observed in the busiest of cities, follow us on www.facebook.com/greenyatra

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2. Long-tailed macaques rest after eating at the Pra Prang Sam Yot temple during the annual Monkey Buffet festival in Lopburi, Thailand, on 28 November 2010. The festival provides food and drinks to the local monkey population, which numbers more than 2,000, to thank them for drawing tourists to the town Follow us on www.facebook.com/greenyatra www.twitter.com/greenyatra

3. Bejuquillo cafe ( Oxybelis aeneus ) snake at Ostional National Wildlife Refuge in Costa Rica Follow us on www.facebook.com/greenyatra www.twitter.com/greenyatra

4. A one-horned rhinoceros and its calf at Pabitora wildlife sanctuary. The sanctuary, which covers an area of 38.8 square kilometres, is home for the one horned rhinoceros and thousands of migratory birds Follow us on www.facebook.com/greenyatra www.twitter.com/greenyatra

5. A Siberian tiger growls at the St-Felicien wildlife zoo in St-Felicien, Quebec. According to National Geographic, the wild population of Siberian tigers, also called Amur tiger, is estimated between 400 and 500 and is classified as an endangered species Follow us on www.facebook.com/greenyatra www.twitter.com/greenyatra

6. A snow-covered deer in Knowle park in Kent. Follow us on www.facebook.com/greenyatra www.twitter.com/greenyatra

7. A snowy egret ( Egretta thula ) at a mangrove swamp in Cancún, Mexico Follow us on www.facebook.com/greenyatra www.twitter.com/greenyatra

8. A bear walks through the snow covered Bear Park in Berne, Switzerland A flock of swans fly with the air temperature at about -18C on the outskirts of Minsk Follow us on www.facebook.com/greenyatra www.twitter.com/greenyatra

9. Mangrove plants grow on a shore in Cancún. In the 40 years since Cancún was founded, countless acres of mangrove forests up and down Mexico's Caribbean coast have been lost - and the destruction continues. Follow us on www.facebook.com/greenyatra www.twitter.com/greenyatra

10. Migrating white pelicans swim in the water at the Hula Valley nature reserve, north of the Sea of Galilee, Israel. Nearly the entire European population of this species migrates over Israel twice a year. The heavy and large birds pose a considerable threat to aviation in the small airspace of Israel Follow us on www.facebook.com/greenyatra www.twitter.com/greenyatra

11. A polar bear cub travelling on its mother's back. A polar bear tracker programme, run by Canon and WWF, has revealed that baby polar bears are now travelling around on their mothers' backs while swimming Reflections of snow covered trees are seen in a lake near Sutton Bank, northern England. Britain is braced for a freezing fortnight, with motorists warned to be wary on roads as sub-zero temperatures turn rain, sleet and snow to ice Follow us on www.facebook.com/greenyatra www.twitter.com/greenyatra

12. A snowy owl ( Bubo scandiacus ) in the snow in Germany. Snow still covers various parts of Germany Follow us on www.facebook.com/greenyatra www.twitter.com/greenyatra

13. Bees fly over a flower in a sunflower field in Thailand. Lopburi province is the heart of Thailand's sunflower oil industry and most of the oil is exported to foreign markets. The region of Lopburi has an abundance of sunflower fields and the Sunflower Blooming Festival is celebrated every year around November to December Follow us on www.facebook.com/greenyatra www.twitter.com/greenyatra

14. Black swans are native to Australia. A number of the water birds have escaped from captivity in the UK and there are now estimated to be 500 in the wild, though the breeding populations are thought not to be self-sustaining Follow us on www.facebook.com/greenyatra www.twitter.com/greenyatra

15. An egret stands among anemone flowers in Ben-Shemen forest, Israel Follow us on www.facebook.com/greenyatra www.twitter.com/greenyatra

16. A grey whale surfaces at the Ojo de Liebre lagoon in Guerrero Negro, Mexico. The coastal lagoon is located in the middle of the Baja California peninsula and is one of three primary breeding and calving grounds for the grey whale. Follow us on www.facebook.com/greenyatra www.twitter.com/greenyatra

17. A burrowing owl perches in front of Greenpeace activists who were arrested for raising an inflatable model of a wind turbine in front of Congress in Brasilia, Brazil Follow us on www.facebook.com/greenyatra www.twitter.com/greenyatra

18. Ponies groom each other on Bodmin Moor, UK. South West Equine Protection (SWEP) has been called in to investigate after it was alleged that the animals, which are classed as semi-feral, were being allowed to starve by their owners. Follow us on www.facebook.com/greenyatra www.twitter.com/greenyatra

19. A crocodile on a river bank in the Bundala nature reserve in Sri Lanka. Crocodiles can live in a variety of wetlands – from salty coastal flood plains to freshwater lakes and rivers Follow us on www.facebook.com/greenyatra www.twitter.com/greenyatra

20. Salmon leaps in the river Etterick in Selkirk, Scotland . Follow us on www.facebook.com/greenyatra www.twitter.com/greenyatra

21. A large flock of starlings swoops off the coast of Brighton, UK Follow us on www.facebook.com/greenyatra www.twitter.com/greenyatra

22. A sea lion at the Ojo de Liebre lagoon in Guerrero Negro, Mexico. The coastal lagoon is located in the middle of the Baja California peninsula forming part of the El Vizca no Biosphere Reserve Follow us on www.facebook.com/greenyatra www.twitter.com/greenyatra