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| Open AccessInnate recognition of water bodies in echolocating bats
Little is known about the way bats recognize large objects, such as trees, buildings or a lake. Greif and Siemers show that bodies of water are recognized solely by echolocation, and that this ability is innate, thus smooth surfaces are recognized as water by naive juvenile bats.
- Stefan Greif
- & Björn M. Siemers
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Breeding latitude drives individual schedules in a trans-hemispheric migrant bird
The bar-tailed godwit departs from New Zealand for breeding sites in Alaska. Here, using geolocators, godwits are shown to time their migration depending on the latitude of their breeding site in Alaska; early migrators locate in the south of Alaska, whereas later birds breed in the North.
- Jesse R. Conklin
- , Phil F. Battley
- & James W. Fox
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Article
| Open AccessMale water striders attract predators to intimidate females into copulation
Female water striders have evolved a strategy to control the frequency of copulation. In this article, male water striders are shown to attract predators during copulation to coerce the female into yielding more quickly. These findings demonstrate how adaptive behaviour may be influenced by predation.
- Chang S. Han
- & Piotr G. Jablonski