article_snippet: Experts have warned that darkening skies could make nocturnal animals such as owls more alert and cause creatures that are usually awake during the day, such as sheep, to find a place to sleep - as well as possibly silencing songbirds.
article_snippet: Farm animals out in the fields might stop grazing and move to a more sheltered place as Farm animals out in the fields do at night,' MailOnline said, before adding that because all animals have 24 hour body clocks, all animals know it is not night time but that something unusual is going on.
article_snippet: pet dogs and cats'll notice it will get dark,' Professor Broom said, before adding: 'Although night happens every day, you don't have a substantial change in light intensity in the morning, so it's a bit disturbing for pet dogs and cats.'
article_snippet: Dogs, for example, will probably be more alert and pay more attention to what's going on around Dogs more then usual because Dogs will be 'sightly surprised'.
article_snippet: Charlotte Vermeulen, a biologist at the Artis Zoo in Amsterdam told Nasa that animals tend to act strangely when the sky turns dark, because animals are disorientated by the sudden appearance of ‘night-time’.
article_snippet: Charlotte Vermeulen, a biologist at the Artis Zoo in Amsterdam the Artis Zoo in Amsterdam Amsterdam told Nasa that animals tend to act strangely when the sky turns dark, because animals are disorientated by the sudden appearance of ‘night time’.
article_snippet: She said: 'Diurnal animals - those that are awake during the day - do what they usually do at night: sleep!
highlights_snippet: Expert claims dogs and cats may be 'sightly disturbed' by unusual lighting .
  