Hematological parameters vary with life history stage in the pale-breasted thrush (Turdus leucomelas)

The avian life cycle is composed by a progressive sequence of life history stages (LHS). Changes in energy expenditure and exposure to stressors at different LHS require corresponding changes in behavior, physiology, and morphology. Variation in hematological parameters, such hematocrit (Hct), hemoglobin (Hb), and heterophil to lymphocyte ratio (H/L ratio), can have permissive, stimulatory, and preparative actions to help maintain homeostasis through different LHS. Few studies have examined differences in these parameters among different LHS in free-living birds, with most of them restricted to temperate zones. We collected blood samples and measured hematological parameters every week for over a year from a population of a common resident bird species in southeastern Brazil, the pale–breasted thrush (Turdus leucomelas). Hematocrit and hemoglobin concentration were highest during the onset of the reproduction and lowest during molt. Furthermore, H/L ratios were higher at the end of the ..., , , # Hematological parameters vary with life history stage in the pale-breasted thrush (Turdus leucomelas)

[https://doi.org/10.5061/dryad.5qfttdzdq](https://doi.org/10.5061/dryad.5qfttdzdq)

This dataset was collected in the Universidade Estadual Paulista (UNESP) - Rio Claro in Sao Paulo, Brazil (2017)

**ID**: individual metallic band id given to each individual

**day**: day of the year when capture occurred

**hour and hour.ori**: **hour.ori** indicates the real hour each individual got captured. For **hour** we considered time, in minutes, after 6:00am.

**Temperature**: mean temperature, in celsius, at the time of capture.

**sex**: sex of each captured individual

**LHS**: life history stage of each individual at the time they got captured

**hematocrit**: hematocrit value (%) for each individual

**hemoglobin**: hemoglobin level (g/dL) for each individual

**weight**: body mass, in grams, for each individual

**H_L and H_L.trans**: H/L ratio (heterophil to lymphocyte ratio) and H/L...