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Mammal Families
Sloth

Although there is much more to mammalwatching than listing species, it is – for many of us – a fun way to track our effort. Mammal listing is nothing more than a friendly competition. But I believe it can motivate mammalwatchers and also lead to a more interactive and lively community. So if you have a list please share it here. Any questions about what people have seen or where? Just click on their list and ask them.

Create an account – or login to your account – then click on My Account from the top menu to add or manage your lists (or simply click here).

Download the list of all mammal families (Can be used to create a pdf ready for uploading your list)

Mammal Families watching rankings

#

Name

No. of species

List

Latest observations

1

Jon
Hall

150

View

Just 10 families left. A beautiful Banded Linsang in Thailand was my latest in August 2025

2

Martin
Royle

132

View

Latests Families: Shrew Opossum, Franciscana & Monito del Monte - last updated 22nd Oct 2025

3

Alex
Meyer

121

View

Beluga in Tadoussac Sep '25, Beaked Whales in The Azores July '25, Dwarf Sperm Whale in Mexico June '25, Gundi & Naked Mole Rat in Ethiopia Dec '24, Franciscana in Argentina Nov '24, Chinchilla Rat & Octodonts in Chile Oct '24, Amazon River Dolphins in Bolivia Oct '24

4

Karen
Shrader

115

View

List as of 19 Oct 2025. Recent new families: Elephant Shrews, Aardvark, Old World Porcupines, Dassie Rat, and Pangolins.

5

John
Shrader

115

View

List as of 19 Oct 2025. Recent new families: Elephant Shrews, Aardvark, Old World Porcupines, Dassie Rat, and Pangolins.

6

Stuart
Chapman

112

View

Family highlight is probably the Laotian rock rat (Diatomyidae)

7

Brett
Hartl

109

View

Plowing through Australia currently

8

John
Pilgrim

105

View

Mustelids are my favourite family!

9

Samuel
Marlin

104

View

Our best families observed are platypus, koalas and echidnas: all in Australia

10

Jan
Ebr

101

View

Sperm Whale and Beaked whales Azores 2025, Octodonts, Chincilla Rats and Monito del Monte Chile 2025, Solenodon and Manatee DR 2025/6

11

Cathy
Pasterczyk

99

View

As of December 2025. Bowhead Whale 2022, Hispaniolan Hutia 2024, Hispaniolan Solenodon 2024.

12

Ben
Chapple

92

View

Not far to go to 100!

13

Valentin
Moser

82

View

Lastest: Kogiidae, Monodontidae (Beluga), Ziphiidae (Northern Bottlenose and other species by now)

14

Becky
Royle

79

View

Birch-Mouse - last updated 22nd Oct 2025

15

Michael
Johnson

75

View

New this year: Solenodons, Spiny Rats (Hutias), Colugos.

16

Ashton
Reiser

61

View

Beaked Whales, Rhinoceroses, Dolphins, Sperm Whale, Cats, Sloths, Kangaroos, Armadillos

17

Warren
Gilson

51

View

Most recent and probably my favourite family - Mustelids, with Asian Badger and Altai Mountain Weasel

18

Tiger
Royle

45

View

Birch-Mouse - last updated 22nd Oct 2025

19

B.
Kao

43

View

Heteromyidae in Las Vegas Oct '25; Geomyidae in Las Vegas Sep '25; Felidae, Castoridae, and Bovidae in Las Vegas Aug '25; Ziphiidae, Kogiidae, and Physeteridae in Azores '25

20

Diedert
Koppenol

40

View

120 families to go!

21

Ellen
Linton

40

View

Latest family lifers are Mexican Long-tongued Bat and Collared Peccary.