Adaptive colouration in wildebeests, part 5: infants and juveniles

In all forms of wildebeest, infants differ in colouration from adults. However, only in albojubatus and mearnsi do infants have clearly conspicuous colouration, particularly a facial flag (mearnsi Juveniles tend to have pale lower legs (e.g. mearnsi; taurinus eastern form and and; and ?western form, possibly qualifying as a pedal flag.

In gnou, infants have cryptic colouration with a tendency for a dark face and pale feet.

In mearnsi, infants possess a facial flag in which the dark of the muzzle contrasts with the pale of the cheeks.

In albojubatus, infants possess a facial flag and pale feet. In contrast to mearnsi, the facial flag is not lost in the juvenile, being part of adult colouration.

Several forms of wildebeest have individually variable pale chevrons on the forehead of juveniles, but only in albojubatus does this contrast enough with the adjacent dark to qualify as part of a facial flag. What this means is that the facial flag, which distinguishes albojubatus from all other forms of wildebeest in adulthood, is also particularly well-developed in infants and juveniles.

In taurinus eastern form, infants have cryptic colouration with an individually variable tendency for a dark face: and and and and and

In taurinus western form, infants are similar to those of the eastern form: and and and and

Posted by milewski milewski, 10 July, 2021 04:52


The following shows about the maximum dark/pale contrast on the forehead of juvenile mearnsi:

Posted by milewski over 1 year ago (Flag)
Posted by milewski over 1 year ago (Flag)

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