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Advancing scientific knowledge and conservation of birds
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Home parasites
photo of six newly hatched swallow nestlings, arranged from largest to smallest
The size hierarchy within a brood of Tree Swallows. Photo by Sara Sparks.
29 January 2020

AOS

Testing Tree Swallow Nestlings’ Parasite Susceptibility

In many bird species, the eggs in a clutch don’t necessarily hatch at the same time, creating a hierarchy of size within broods.

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