The effect of climate on nest orientation in the Rufous Hornero Furnarius rufus

Figures & data

Figure 1. Circular distribution of the entrances of Rufous Hornero nests in a subtropical urban site in the city of San Salvador de Jujuy, Argentina. The mean orientation (±SE) and the total amount of observations (numbers in the bars) are shown: (A) nests found during the whole breeding season (n = 74), (B) nests found during the first reproduction period (n = 32), and (C) nests found during the second reproduction period (n = 42).

Table 1. Local climatic variables measured during the first nesting period (September and October of 2018, cold with low rainfall), and the second breeding period (November 2018 to February 2019, warm with high rainfall), in the city of San Salvador de Jujuy, Argentina. It shows total rainfall (range), mean ± SD (range) temperatures, and wind direction (±SD). Statistical analysis: chi-square test (χ²), the Tukey test (t), and Watson-Williams test (F).

Climatic variables	Period		Statistical analysis
	First breeding months	Last breeding months
Total rainfall (mm)	115 (2–46)	450 (3–52)	χ^2 = 0.59, P < 0.001
Morning temperature (°C)	16.76 ± 4.05 (4.50–24.00)	19.38 ± 2.99 (13.00–25.10)	t = 46.40, P < 0.001
Afternoon temperature (°C)	24.83 ± 5.69 (5.20–35.60)	25.38 ± 5.10 (12.90–34.30)	t = 0.43, P = 0.512
Night temperature (°C)	15.58 ± 4.59 (3.10–27.10)	19.44 ± 3.41 (11.00–26.80)	t = 52.96, P < 0.001
Winds direction (°)	125 ± 51.9	128 ± 39.1	F = 6.35, P = 0.034