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Protection for a fee: Band-tailed Gulls and Red-legged Cormorants

10,000 Birds

Frigatebirds don’t occur in the cold waters of the coast of Peru and Chile, but Band-tailed Gulls (Larus belcheri) have developed similar strategy. This system of “fee” in exchange for protection from being overwhelmed by many thieves seems to work. It is, to some extent, a win-win situation.

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What’s Up with the ABA?

10,000 Birds

This strikes me as a puzzling communication strategy for an important issue. T]he Association had suffered net losses and has a net deficiency in net assets that raise substantial doubt as its ability to continue as a going concern.”. Simply put, birding is fundamentally different than it was 50 years ago.

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Pied Oystercatchers breeding in Broome

10,000 Birds

The Pied Oystercatchers are actually incredibly predictable when it comes to the dates that they lay eggs, the locations that they choose and the various strategies that each pair use in order to protect their young. They also appear to take more risks as they develop and this can be to their detriment.

Breeding 180
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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. The main problem appears to be feral cats, but there is also predation from birds of prey and the parent Pied Oystercatchers do their utmost to protect their young. The last time they successfully raised a chick was in 2012.

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Where have they gone?

10,000 Birds

Gathering more detailed information about wintering populations, and which roost sites they rely on, will help us protect them and develop more effective conservation strategies.” These gulls are all of conservation concern, and their breeding populations are either Amber- or Red-listed in the UK.

Ireland 246
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Outstanding Pied Oystercatcher parenting!

10,000 Birds

Each pair has a strategy and sometimes it is successful and sometimes it is not. Over the years some pairs of Pied Oystercatchers appear to learn how to protect the eggs and their young much more effectively and are therefore successful where other pairs may fail.

Eggs 165
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Birding the Kruger Park (2): Bateleur area

10,000 Birds

Wikipedia also has an interesting paragraph hinting at observation bias in ornithologists: “At the continental scale, saddle-billed storks preferred protected areas that have a higher extent of open water compared to areas without the storks. The benefit for the wasps is that they get to keep a beautiful pet.

Ostriches 147