H. Schwabl

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

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.