J. Boersma

Plural breeding among unrelated females and other insights on complex social structure in the cooperatively breeding Variegated Fairywren

The paper examines the social structure of Variegated Fairywrens, finding that plural breeding occurs frequently and cooperation is supported by varying genetic relationships within groups.

Does capacity to elevate androgens underlie variation in female ornamentation and territoriality in White-shouldered Fairywren (Malurus alboscapulatus)?

The paper investigates whether the ability to elevate androgens underlies differences in female ornamentation and territoriality between subspecies of White-shouldered Fairywren, finding no such association.

Unexpected long-term retention of subcutaneous beeswax implants and additional notes on dose and composition from four testosterone implant studies

Community science for enigmatic ecosystems: Using eBird to assess avian biodiversity on glaciers and snowfields

This study uses eBird community science data to assess avian biodiversity on glaciers and snowfields, finding 46 species with four specialists, and highlights the value of community science for studying remote ecosystems.

A novel camera trap design for studying wildlife in mountain glacier ecosystems yields new insight for glacier biodiversity in the Pacific Northwest, USA

This study tests a novel camera trap design for glacier ecosystems and documents wildlife and human activity in a mountain glacier in the Pacific Northwest.

Male White-shouldered Fairywrens (Malurus alboscapulatus) elevate testosterone when courting females but not during territorial challenges

The paper tests two versions of the challenge hypothesis in White-shouldered Fairywrens, finding testosterone elevation during courtship but not territorial challenges.

Wildfire affects circulating hormone levels and the expression of male sexual plumage in a tropical songbird

This study shows that wildfires delay ornamentation in male birds without affecting body condition, but alter hormone levels and testosterone-plumage correlations.

Testosterone induces a female ornament followed by enhanced territoriality in a tropical songbird

Testosterone induces partial ornamentation in unornamented female birds, which is followed by increased territorial behavior, suggesting ornamentation drives aggression rather than testosterone alone.