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Differences in (a) haptoglobin, (b) nitric oxide, (c) ovotransferrin, (d) haemagglutination titre and (e) % occurrence of haemolysis between breeding and moult stages within the wet season in female Common Bulbuls sampled over two annual cycles in Nigeria. Annual cycle stages were determined based on occurrence of brood patch and feather quality: NM—non‐moulting; M—moulting, B—breeding and NB—non‐breeding. Sample sizes are indicated below each box/bar
