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Bird nest parasites gave contrasting signals under tree cover

Fly larvae and mites varied differently across house-wren nesting sectors in Argentina.

Evidence
Peer-reviewed
Geography
House-wren nesting areas, Argentina
System
Avian ectoparasites and nest vegetation

WHAT THE EVIDENCE SAYS

Philornis larval loads were higher in exotic-tree habitat than fragmented habitat, whereas nest-mite loads were lower in both native- and exotic-tree habitat than fragmented areas.

WHY IT MATTERS / OUR READ

A vegetation change can affect distinct parasite groups differently; one burden metric is not whole-system health.

CAVEATS / UNCERTAINTY

Unreplicated habitat sectors and confounded site differences prevent a causal tree-cover claim.

SOURCE

Parasitology Research (27 Oct 2026)
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