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With a readership primarily of students, Jones—wisely, I believe—refrained from including the controversial efforts to kill Barred Owls in order to save the spotted ones. Jeopardy star James Holzhauer became a multi-millionaire in part by reading picture books as part of his game strategy.
Fortunately for them (though less so for the cuckoo), in one experiment they ejected 100% of all cuckoo model eggs. A relative of them, the Brown-breasted Bulbul, relies on a different strategy to avoid being cuckolded – placing their nests away from forests (where the cuckoo lives), and aggressively attacking cuckoos.
Both pelicans have a very specialized foraging strategy that depends on abundant fish near the surface. Some pesticides killed pelicans directly, while DDT contamination led to thin-shelled eggs that broke under the weight of the parents. Both are the only Pelican in their non-overlapping breeding grounds.
Studies on improving ostrich egg hatchability. Also, I learned that in the US , ostrich eggs are priced at $40-$75. Each fresh egg weighs 4 pounds and is the equivalent of 24 chicken eggs. . Medicinal and commercial uses of ostrich products in Tanzania. Ostriches originated in Asia. Ostrich industry in Egypt.
A nest wasn’t found until 1903, which set off a craze for Kirtland’s Warbler skins, nests, and eggs. history; they killed a young boy just to prove they could commit the perfect crime and were the models for the murderers in Hitchcock’s film Rope. Leopold and his friend Richard Loeb are two of the most infamous murderers in U.S.
In the 19th- and early 20th-centuries, shorebirds were killed outright for their meat, a trade that only ended with the passage of federal legislation (which still excepts game birds such as woodcock and snipe). These days we need to conserve habitat and maintain a balance of food sources.
While having somebody else raise your chicks like an attractive strategy to me, it is not without dangers. A paper reports on how a female Common Cuckoo was mobbed and killed by Oriental Reed Warbler hosts. The photos of the dead cuckoo published in the paper would not look out of place in a horror movie for a cuckoo audience.
The quills of the “Saqu Ettair” Secretarybirds feed on small lizards, insects, rodents, birds eggs and, of course, snakes. Secretarybirds counter this by being very careful when killing snakes and ensuring that the prey is dead before eating it. Watching them hunt is fascinating.
Gisela Kaplan has written a book about the species, and how they seem unperturbed by humans: “It’s one of their most successful defense strategies. When these birds breed, this can lead to highly cringeworthy announcements, for example from Adelaide Zoo : “We have egg-citing news! .” This is what killed James Dean.
In Common Snipes , apparently, the wing shape is correlated with the migration strategy of individual birds. An example is this study showing that indeed, cuckoo eggs are stronger than the eggs of the host species. Here’s another cuckoo undergoing a pre-flight check.
To be honest, both the robin and the flycatchers shown above remind me of the easter eggs I hunted for as a child – the same strong colors in front of a green background, same time of the year (feel free to insert your own Proust Madeleine reference here) … Bluethroats apparently are good at imitating other birds.
The Large-billed Crow ( video ) is one of the natural enemies – in the study above, it predated 19 eggs from four pitta nests. Different from many other parasitic cuckoos, the chick typically does not kill all its nest mates, though one or two of them may die from starvation. And how do Fairy Pittas get injured and possibly die?
I have written about the interesting sex life of these jacanas a few times already (short version: female mates with male, lays a bunch of eggs for him to incubate and raise the chicks, leaves him, finds another male, repeat). Apparently, after a male first mates with a female, he throws out the first one or two eggs she lays in their nest.
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