The week in wildlife - in pictures

A stag in a field of canola in Alberta, Canada Photograph: Jeff McIntosh/AP An Egyptian goose and her young cross the road in London Photograph: Martin Karius/Rex Features Iguanas for sale at the oriental market in Managua, Nicaragua Photograph: Mayerling Garcia/AFP/Getty Images A helicopter is used to round up wild horses in the Conger Mountains near Border in Utah Photograph: Jim Urquhart/REUTERS Canada geese swim amid algae scum along a stretch of the Regent's Canal in London, England. British canals and lakes have been blighted this summer by green porridge-like toxic scum that has been caused by an unusually high number of algae blooms. A combination of the mild weather and high levels of phosphate nutrients from agriculture and homes are to blame, says the Environment Agency Photograph: Jim Dyson/Getty Images A camel suckles at its mother's udder at a water point in Liboi in Kenya, near the Somalia border Photograph: Thomas Mukoya/REUTERS A goose feeds on the bank of a dried-up creek bed near Lake Arlington in Texas. The drought that has turned Texas and parts of the plains into a parched moonscape of cracked earth could persist into next year, prolonging the misery of farmers and ranchers who have endured a dry spell now expected to be the state’s worst since the 1950s, the US Climate Prediction Center said this week Photograph: Tim Sharp/REUTERS A box jellyfish at the Two Oceans Aquarium in Cape Town. Box jellies, also called sea wasps and marine stingers, live primarily in coastal waters off northern Australia and throughout the Indo-Pacific. Their venom is considered to be among the most deadly in the world, containing toxins that attack the heart, nervous system, and skin cells Photograph: Nic Bothma/EPA A group of pigeons rest on an overhead electric wire in Srinagar, India Photograph: Fayaz Kabli/REUTERS A sunflower field in southern France Photograph: Jean-Philippe Ksiazek/AFP/Getty Images A lion rescued from a circus, at an animal rescue centre in Bhopal, India Photograph: Harish Tyagi/EPA