<< Previous Next >>

Bonnet macaque

Bonnet macaque
Photo Information
Copyright: Ashok Kumar (ashok_delhi17) Silver Note Writer [C: 1 W: 0 N: 17] (151)
Genre: Animals
Medium: Color
Date Taken: 2010-09-30
Categories: Mammals
Camera: Canon EOS 40 D, Canon 17-85 USM IS
Exposure: f/5.6, 1/320 seconds
More Photo Info: [view]
Photo Version: Original Version
Date Submitted: 2011-09-16 6:30
Viewed: 2662
Points: 2
[Note Guidelines] Photographer's Note
A Boneet Macaque in the Wayanad Hills...

The bonnet macaque (Macaca radiata) is a macaque endemic to southern India. Its distribution is limited by the Indian Ocean on three sides and the Godavari and Tapti Rivers along with a related competing species of rhesus macaque in the north. The land use changes in last few decades has resulted in changes in its distribution boundaries with the rhesus macaque, raising concern for its status in the wild.

This Old World monkey is a diurnal animal. It is 35-60 cm long plus a tail of 35-68 cm. Males weigh 5.5 to 9 kg., females 3.5 to 4.5 kg. It can live more than 30 years.

The bonnet macaque feeds on fruits, nuts, seeds, flowers, invertebrates and cereals. In southern India this macaque exists as commensal to humans, feeding on food given by humans and raiding crops and houses.

The bonnet macaque, like other macaques, share a dominance hierarchy which is linear. It means that there is an 'alpha' male who is the most dominant male of the troop, followed by a 'beta' male and 'gamma' and so on according to their dominance. Similarly for females also there is an 'alpha' female, 'beta' female 'gamma' female etc. The male and female hierarchies are different and of a non overlapping or non mixing type. Usually males are dominant over females, but this is not always so.

The females have a stable dominance hierarchy, which changes very rarely, whilst the dominance hierarchy of males is very dynamic. In the male hierarchy there is always a competition to rise in rank with fights between close ranks common. A male has the best chance of obtaining high rank in his prime age resulting in the greatest benefits to reproduction. High rank individuals have first access to breeding females. Females are receptive during only a few months in a year resulting in competition between males. In this situation the rank which has been established by aggressive encounters come into play. Most of these aggressive encounters are easily resolved however when similarly built or similarly aggressive males compete its results into brutal and sometime fatal fights. Different males may employ various means to rise in rank. Coalition formation between unrelated males to oust a more dominant male has been observed. Males often move from troop to troop to gain higher rank with the resulting benefits. However there have been cases observed when a male remains in a single troop, rising to become dominant male of that troop.

In the case of females the stable dominance hierarchy is a result of female philopatry. Philopatry indicates that individuals tend to remain with the troop that they are born into. This results in the formation of matrilines, groupings of closely related females. These matrilines help each other during antagonistic interactions. As the matrilines are continuously reinforced with new births of females in a troop there is rarely any upturning of ranks. There are a few rare cases of rank reversal for females in which matrilines have become extremely depleted due to few female births. Male infants would not help to reinforce the matrilines as they move off to new troops leaving their natal troops.

more info on: http://en.wikipedia.org/wiki/Bonnet_macaque

Only registered TrekNature members may rate photo notes.
Add Critique [Critiquing Guidelines] 
Only registered TrekNature members may write critiques.
You must be logged in to start a discussion.

Critiques [Translate]

Hi Ashok,

Fantastic picture of this monkey stretching his fingers in a relax mood. The sharpness is great & lovely BG.
Well done & TFS.

Calibration Check