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Pied Oystercatchers and Sand Goannas

10,000 Birds

We have often suspected that the Sand Goannas would steal eggs as a food source from the Pied Oystercatcher nests if they found them. The two pairs should have been close to hatching their eggs from their first clutch. The pair of Pied Oystercatchers to the north have now laid a second clutch of two more eggs.

Eggs 263
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Pied Oystercatcher nesting

10,000 Birds

There are sixteen pairs of Pied Oystercatchers and they have varying success at raising young birds. To the north they are very unlucky with predation before the eggs even hatch out, but to the south the eggs hatch out and then the predation occurs on the chicks.

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Construction of a Pied Oystercatcher nest

10,000 Birds

One of our male Pied Oystercatchers has been marked with an engraved leg flag “A1” and was one of the first pairs to lay eggs this season. Sadly the two chicks did not survive very long at all and the pair of Pied Oystercatchers were soon getting ready to lay more eggs. “A1” Preparing another nest site.

Eggs 111
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Bird Science and Evolution: 2013 Year In Review

10,000 Birds

But there was this one in Australia. Birds are raised from the egg to follow a certain migration timing, but that timing shifts when the egg hatches later or earlier due to changes in conditions. Or, at least, mass die-offs were less often featured in the news. 06–11 Archaeopteryx may have been black and white.

Science 192
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Australia’s extinct and threatened bird species

10,000 Birds

Australia is a vast country with a very small human population, which mostly clings to the edge of the continent. Even the first explorers to Australia documented there was a risk of extinction of birds and animals into the future and subsequently decided to collect as many specimens as possible! Preface,p.xxiv.

Species 176
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Pied Oystercatcher breeding season starts early!

10,000 Birds

Traditionally since 2000 we have encountered our first Pied Oystercatcher eggs in the first week of July, but this year one pair have decided to start laying eggs early! Sadly they have already lost one clutch of eggs to predation, so by July 1st this year they are on their second clutch. Pied Oystercatcher nest.

Breeding 100
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Pied Oystercatcher broken wing display

10,000 Birds

The first eggs are laid during the first week of July each year and if these eggs fail to hatch or the chicks are lost they will lay further eggs within a few weeks. Sadly a lot of eggs are lost to feral cats and chicks are sometimes taken by birds of prey. Nest site with 3 eggs-one white!

2002 167