Thursday, August 13, 2020

Handful of twigs and grass

 Practice run?

Bird's nest, found on ground under evergreens

It doesn't look used; the grass at the bottom is fresh and clean. There are no fragments of eggshell nor pinfeathers.

Some young male birds make several nests that they don't use, until they get the hang of it. Could this be one?

How does the individual bird arrive at such a complex architectural feat? Apparently, they do so through practice. A young male builds faulty nests that are rejected by females and quickly abandoned. With continued practice, he eventually produces a nest that is usable and goes on to reproduce. (How Birds Nest)

And ...

A male marsh wren may build 20 or more “dummy nests” around his territory; the female chooses one, adds lining, and uses it as the actual site for the eggs. (Audubon)

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Un nido de pájaro que encontré en el suelo. Parece que no ha sido usado; las fibras al fondo están limpias; no hay ni plumitas ni pedazos de cascarón de huevo.

Algunos pájaros machos hacen varios nidos como para practicar, No los usan; es parte del aprendizaje.

Dos citas:
1. "¿Cómo llega el pájaro a una hazaña arquitectónica tan compleja? Aparentemente, se logra con lla práctica. Un macho joven construye nidos defectuosos, los cuales son rechazados por las hembras. Con la práctica continua, por fin llega a producir un nido que se puede usar ...
2.Un chochín de pantano macho puede construir hasta 20 o más nidos falsos alrededor de su territorio. La hembra escoge uno, añade revestimiento, y lo usa para criar sus huevos.

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