Rodentia, Lots of mice, rats, guinea pigs, squirrels, hamsters, gerbils, more than 2300 species in nearly 500 genera and 34 families, could be a big topic (no surprise there, as it is the biggest order of mammals!)
Insectivora, shrews, hedgehogs, moles, moonrats, five families, 23 in Erinaceidae (hedgehogs), 9 in Nesophontidae, 3 in Solenodontidae, 43 in Talpidae, 368 in Soricidae, mixed coverage
Chiroptera, Bats, more than 1100 species in 20 families, different style article, mixed coverage
Pholidota, Pangolins, 7 species in 1 genus, One nice article
Carnivora (inc. pinnipedia) Dogs, Raccoons, Bears, Weasels, Skunks, Cats, Civets, Mongeese, Hyenas, Seals, Walrus, ~265 species in 12 families, Mixed coverage, Plenty of excellent articles (inc. a whole project on Dog Breeds)
Perissodactyla Horses, tapirs and rhinos, 15 species in 3 families
Artiodactyla Pigs, hippos, peccaries, camels, deer, giraffe, pronghorn, cattle, sheep, goats, okapi, chevrotains 220 species in 10 families
Cetacea 86 species in ~20 genera, Active WikiProject, Articles to genus or species level of mixed quality, some more general coverage
Doug.(talk • contribs) 02:43, 20 October 2007 (UTC) Focus on domesticated species and their wild relatives and coordinating between this project and WikiProject Agriculture
Metanoid – mostly Carnivora, tho i tend to hop around. i like to dig for sources... so probably a bit of everything! (to tell the truth, i thought i'd already signed on, but i guess that was the drugs talking ;)) – Metanoid (talk, email) 01:27, 29 March 2008 (UTC)
ShoomboolyCurrently: Sort out Bat. Create articles for all bat species (subspecies not included unless notable). Add status system to as many Bat taxoboxes as possible. Why? Because bats have the coolest names
Ironholds 01:40, 29 June 2008 (UTC). I've already created articles on all the missing species in the Arvicolinae subfamily, and am going to be doing so with the rest of the rodent subfamilies.
In general, mammal entries should have taxoboxes. This is something we have inherited from the Tree of Life WikiProject, and is standard. If you don't know how to use a taxobox then leave a message on this talk page or the article's talk page.
Capitalization
The issue of the capitalization of the common names of mammal species is unresolved on Wikipedia and our pages are inconsistent. A large majority of reliable sources do not capitalize and thus there is a strong descriptive argument against doing so. Capitalization will often not "feel" right for editors for this reason. Conversely, because species names are proper nouns there is also a strong argument in favour of capitalization. Upper case usage is well-established with Aves species, for example. There are actually three possibilities in capitalizing:
Never capitalize.
Always capitalize.
Capitalize when the species itself is referred to, as this is proper noun usage, but not where the phraseology indicates a common noun. Thus: "The Tiger is a carnivore" but "three tigers were observed in the conservation area."
The third is most correct orthographically, but it is also the most difficult to maintain. In the absence of consensus:
Respect the original or primary authors; do not up and change something without notification, as you may be reverted.
The form chosen should be used consistently across an article.
Taxonomy
Because mammal taxonomy is constantly being revised and debated, there is no single "correct" taxonomy. In order to minimize inconsistencies and conflicts, this project generally defers to Mammal Species of the World: Third Edition (MSW3) as a taxonomic reference. Exceptions may be made, however, for newly discovered species or taxonomic revisions with significant scientific consensus. For any exceptions to MSW3, please discuss on the relevant talk pages before making changes.
Talk pages
Place {{MaTalk}} at the top of an article's talk page. This will help direct editors to this page for guidance. As monotremes and marsupials already have their own template, this can be placed alongside the other or not at all.