buteo_age: Estimate the age of juvenile buzzards based on wing length
In mottensmann/DBChecks: Checking Database

Buzzard age is estimated based on a standard growth curve modeled from published data by Bijlsma (Limosa 72, 1999).

buteo_age(
  df = NULL,
  wing = "wing",
  sex = "sex",
  unit = c("mm", "cm"),
  .plot = F,
  decimals = 2,
  .show_model = T
)

`df`	data frame containing data
`wing`	column name for wing measurements
`sex`	column name giving the sex of individuals or NULL
`unit`	unit of values. By default in mm
`.plot`	logical
`decimals`	decimals
`.show_model`	logical

Estimations are based on a four degree polynomial fit

Bijlsma, RG 1999: Sex determination of nestling Common Buzzards Buteo buteo. Limosa 72, 1.10

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## 240 mm wing length
# buteo_age(data.frame(wing = c(240,240), sex = c("male","female")))
# buteo_age(data.frame(wing = c(240,240), sex = c(1,0)))

mottensmann/DBChecks documentation built on Feb. 3, 2022, 9:21 p.m.

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