The silverback in a family group is the leader. In the wild he decides what the group does. In zoos their tasks are slightly different; partly because of the space they have, partly because of the fact that they - whether or not on certain fixed times - get food from their care takers.

To start: in every family group in zoos there's only one adult, who is the leader. He can be recognized by a lot of grey hairs on his back and legs and his size. The western lowland silverbacks really have 'grey pants' so to say (where mountain gorilla silverbacks have only a grey band across their back). Sometimes also a big part of their upper back or even shoulders are grey. It's different with every silverback.

A lot of people yell out "look that old one"(or words alike), but the grey hairs don't have anything to do with the age! Because of hormones a male turns grey, as soon as he's the only adult male in a group with females. For instance, when a male moves from a family group at the age of 10 to his own group, he slowly turns grey. He can have these grey hairs when he's 11. I don't remember where I heard it, but I heard someone once tell it can be compared to growing a beard with human males. My thought was 'that's not correct, because growing a beard happens to boys no matter if he's still living with his dad or not'. The turning grey with gorillas is slightly suppressed when a young male still lives with his dad.

It's always funny to hear people say 'that old one' about the silverbacks in Artis or Blijdorp. In both zoos the silverback is the youngest one of the adults. People are very amazed when I tell them. All part of my education Another phrase I hate when people call the silverback (or other gorillas) 'that fat one'. It's so negative (big sigh).

The tasks of a silverback in zoos: he keeps an eye on everything and everyone; most of the time lying down, but also sitting If necessary he intervenes. Most of the time that's when two (or more) of his females have an argument. Luckily that doesn't happen often, but if it does happen, he punishes one of the two by pushing her to the floor and biting her once. Most of the times he does that with the fighting female who's the lowest in ranking. But luckily he knows justice and if the higher ranked female is to blame, he punishes her. Sometimes it also is enough just to stand up and look at both ladies.

The silverbacks I visit don't intervene when a kid has an argument with another kid. That's their mom's job. He also stays away from arguments between a mom and kid (either one of their own or from another female).

Besides above the silverback is the one who can claim all food if he wants to and sometimes he does (especially if it's his favourite food). In general: food around him is his. The others won't come close. And if he sees another one with his favourite food and he wants it, he gets up to get it. Believe me, he won't take it, he just gets it. Every gorilla in a group immediately drops what he/she's holding Well, 'every' gorilla .. except some cheeky kids now and then They just run away and hide somewhere where the silverback can't go.

Those cheeky kids (or even adults) also go to the silverback's spot when he's trying to get food from others

Every silverback has his own personality of course. Some play with their kids, some don't.

A good example of the development of a silverback is Kidogo (the most beautiful silverback I know). He's born in Givskud (Denmark) on 15 November 2000. When he came to Zoo Krefeld on 30 March 2012, I didn't visit that zoo yet. A.J. Haverkamp did. He took photos of Kidogo back then and later on. On the end of this page you see some of his photos.

I'm now following the development of two young men myself: Matadi in Zoo Antwerp and Komale in Safaripark Beekse Bergen. In zoos with bachelors you see several silverbacks. That development is also there with all males. I visit one bachelor group at a regular base (Safaripark Beekse Bergen); the other one (Ouwehands) I only visit about twice a year. I don't like that zoo and the enclosure of the gorillas. It's impossible to follow them all day during a visit because of how it's constructed.

Every silverback has a large sagittal crest on top of his head. That's not because he has so many so many females and kids His jaw muscles are there. These are attached to the crest on his head. Watch a silverback when he's eating; the top of is head is moving.

Something else about a silverback is something you wouldn't expect: the size of his penis. You can't see a silverback's penis very well. I have seen many silverbacks lying down in front of me with their legs spread: but because of all the hair and the penis being so small, it just can't bee seen. Once I saw a gorilla's penis in erection. That was Bokito. He was looking at a few older ladies who were standing next to me. Since Bokito is hand reared, he's focused on females. He has a soft spot for blond or greyish ladies. So while he was watching these ladies, his penis 'went up' Of course I had to make a photo of it (click here to see it) The funny thing: when I posted this photo on silverback asking what the viewer was looking at, everyone thought it was his nipple.

Typical for a silverback is his odour now and then. A lot of people dislike that odour; I don't. That odour appears whit various sorts of 'excitement' not (only) sexual

Development Kidogo, Zoo Krefeld
The first photo is from when he just arrived (4 May 2012); a few months later (6 July 2012) he already changed a lot!! The photos (all from A.J. Haverkamp) speak for themselves.


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