User:RadicalDolphin2/sandbox

Article Evaluation
Content: The article's contents are relevant and informative, but it seems like there's not a whole lot of information.

Tone: The tone of the article is very neutral and strictly informative.

Citations: Facts in this article are not well cited. There are only 4 references and one of these references barely has anything to do with the topic at hand. More appropriate sources are needed.

Talk: There is only one note left in the Talk page of this article, and it would be a good contribution to the overall article, but of course sources are needed. The article is C-Class and of interest to 3 different wikiprojects.

Draft of Changes
Edit the opening paragraph, from saying "contact calls are not a specific signal, designed to communicate some specific information. It is rather a mixture of various sounds, accompanying the group's everyday business" to:

Contact calls are unlike other calls (such as alarm calls) in that they are not usually widely used, conspicuous calls, but rather short exclamations that differ between individuals. Often, the message that the call is meant to convey is specific to the individual or group's activity, such as informing other members of the group about one's location while foraging for food.

Remove the sentence "Contact calls are used to maintain audio contact with the members of the group." by incorporating that statement into the first sentence.

Under the Birds heading;

In parapatric and sympatric species, where territories of one species may border or overlap with that of another species, the contact calls of each species may evolve to help differentiate one species from that of another in close proximity. Where one species may have little to no variation among the contact calls of distinct allopatric populations, the populations within overlapping conspecifics' territories may change their contact call to sound different from the bordering population's, and the same is true for certain species of birds such as the White-eyed Birds (Zosterops spp.) with increasing elevation and longitude/latitude.

Change the heading from "Ring-Tailed Lemur" to be a sub-heading under "Primates", and within;

Add subheading "Pygmy Marmosets"

Pygmy marmosets have developed a vocal system using two acoustically different contact calls have been established, which individuals could use to identify other individuals within a population. The call an individual uses varies as a response to the call that they've heard. If one of the contact calls is played over a loudspeaker from a familiar location to the marmoset, the response from a given individual can be predicted, indicating that the calls are used as an identification mechanism of communication.

Add subheading "Baboons"

Chacma Baboons have been observed to use contact calls not only as identification tools and locators of members of the group, but also as a way of communicating messages with one another about their status with respect to the main group. Mother baboons can recognize and locate the contact calls or barks of her offspring when they forage or explore independently, such as to be able to find them when they get lost and need help finding their way back. The mothers never bark back, unless she is in danger of being separated from the group (i.e. searching for her offspring will lead her too far astray from the group as it moves through the terrain). In this case, she will venture out slightly in the direction of the calling infant and bark back intermittently to let the lost baboon track her voice down and make its way back to the group.