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In this way, the cuckolding Cuckoo can convince its cuckoldee, the Reed Warbler, to back off when the Cuckoo comes around, allowing the Cuckoo to toss out one of the Warbler’s eggs and replace it with one of its own, to be raised by the hapless Warbler parents. Science 3 August 2012: 578–580 a.
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.
Egg loss to predation has been extraordinarily bad this year and all of the nests mentioned in the last post were lost and all of the pairs of Pied Oystercatchers laid a new clutch of eggs. In fact they have not just laid once again, but many pairs have laid up to five clutches of eggs this season.
They may be about bird eggs ( The Most Perfect Thing: The Inside (and Outside) of a Bird’s Egg , 2016), or a 17th-century ornithologist ( Virtuoso by Nature: The Scientific Worlds of Francis Willughby, 2016), or How Bullfinches learn songs from humans ( The Wisdom of Birds: An Illustrated History of Ornithology.
After 28 days of sharing the duty of sitting on three eggs we finally had the arrival of our first Pied Oystercatcher chicks for 2012 on Friday August 3rd. It is unusual for three eggs to be laid here in Broome and many eggs do not even hatch due to predation each season.
As a Northeast birder I am familiar with the alarming decrease in the number of Red Knots along Atlantic shores and have signed petitions and written e-mails calling for legislation and rules that will limit the overharvesting of the horseshoe crab, whose eggs Red Knots depend on. Rutgers University Press/Rivergate Books, 2012.
Jackson, 2012. A nest wasn’t found until 1903, which set off a craze for Kirtland’s Warbler skins, nests, and eggs. The University of Michigan Press, 2012. photo by Lynn C. The Kirtland’s Warbler is divided into three sections: The Past, The Present, The Future. By William Rapai. Hardcover, $24.95
This year is the eighteenth year since we discovered our first Pied Oystercatcher nest on Cable Beach in Broome and it didn’t take us long to realise that they are not at all successful at raising young due to egg and chick predation. He last raised a chick successfully in 2016 and has nested in this area since 2008.
2011 is about to become 2012 and birders the world over are taking a look at their year lists and reminiscing about the awesome sightings and devastating dips that they have experienced. Rest assured that those 10,000 Beat Writers who did not submit a Best Bird of the Year will see only coal in their stockings and nary a life bird in 2012!
That is a big difference compared to the 2,000+ singing males detected in 2012, well above the recovery goal for this species set by the U.S. The most notorious effect is that their eggshells become so thin that a parent bird will crush it’s eggs while attempting to incubate them. Fish and Wildlife Service.
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.
In contrast, the females need to make sure not to get duped into raising actual cuckoos – the buntings are a targeted host species ( source ). Fortunately for the buntings, they seem to detect most cuckoo eggs smuggled in (75% in one study). Maybe there is some justice in this world after all. Better safe than sorry.
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