How many baby Irrawaddy dolphins are in a litter?
A Irrawaddy dolphin (Orcaella brevirostris) usually gives birth to around 1 babies.
Each of those little ones spend around 425 days as a fetus before they are released into the wild. Upon birth, they weight 2 grams (0 lbs) and measure 13.5 cm (0′ 6″). They are a member of the Delphinidae family (genus: Orcaella). An adult Irrawaddy dolphin grows up to a size of 2.5 meter (8′ 3″).
To have a reference: Humans obviously usually have a litter size of one ;). Their babies are in the womb of their mother for 280 days (40 weeks) and reach an average size of 1.65m (5′ 5″). They weight in at 62 kg (137 lbs), which is obviously highly individual, and reach an average age of 75 years.
The Irrawaddy dolphin (Orcaella brevirostris) is a euryhaline species of oceanic dolphin found in discontinuous subpopulations near sea coasts and in estuaries and rivers in parts of the Bay of Bengal and Southeast Asia.
Other animals of the family Delphinidae
Irrawaddy dolphin is a member of the Delphinidae, as are these animals:
- Atlantic spotted dolphin weighting around 110 kilograms (242.51 lbs)
- Tucuxi weighting around 42.82 kilograms (94.4 lbs)
- Northern right whale dolphin weighting around 113 kilograms (249.12 lbs)
- Indo-Pacific bottlenose dolphin raching a size of 2.37 meter (7′ 10″)
- Atlantic white-sided dolphin with 1 babies per pregnancy
- Atlantic humpback dolphin weighting around 100 kilograms (220.46 lbs)
- Heaviside’s dolphin weighting around 40 kilograms (88.18 lbs)
- Killer whale with 1 babies per pregnancy
- Dusky dolphin weighting around 127.25 kilograms (280.54 lbs)
- Peale’s dolphin weighting around 120 kilograms (264.55 lbs)
Animals that share a litter size with Irrawaddy dolphin
Those animals also give birth to 1 babies at once:
- Bawean deer
- Little free-tailed bat
- Malayan porcupine
- Coppery ringtail possum
- Greater mouse-eared bat
- African sheath-tailed bat
- Sinaloan mastiff bat
- Egyptian slit-faced bat
- Egyptian fruit bat
- Taiwan vole
Animals with the same weight as a Irrawaddy dolphin
What other animals weight around 190 kg (418.88 lbs)?
- Sambar deer usually reaching 176 kgs (388.01 lbs)
- Dwarf sperm whale usually reaching 183 kgs (403.45 lbs)
- Barasingha usually reaching 171.22 kgs (377.48 lbs)
- Mountain nyala usually reaching 215 kgs (473.99 lbs)
- Thorold’s deer usually reaching 161.68 kgs (356.44 lbs)
- Philippine warty pig usually reaching 189.4 kgs (417.56 lbs)
- Caribbean monk seal usually reaching 198.38 kgs (437.35 lbs)
- South American sea lion usually reaching 193.67 kgs (426.97 lbs)
- Asinus usually reaching 172.5 kgs (380.3 lbs)
- Mountain tapir usually reaching 155.46 kgs (342.73 lbs)
Animals with the same size as a Irrawaddy dolphin
Also reaching around 2.5 meter (8′ 3″) in size do these animals:
- Banteng gets as big as 2.08 meter (6′ 10″)
- Mediterranean monk seal gets as big as 2.6 meter (8′ 7″)
- Atlantic white-sided dolphin gets as big as 2.29 meter (7′ 6″)
- South American sea lion gets as big as 2.11 meter (7′ 0″)
- American bison gets as big as 2.85 meter (9′ 5″)
- Common bottlenose dolphin gets as big as 2.83 meter (9′ 4″)
- Blue wildebeest gets as big as 2.01 meter (6′ 8″)
- Sambar deer gets as big as 2.04 meter (6′ 9″)
- Kouprey gets as big as 2.18 meter (7′ 2″)
- Reindeer gets as big as 2.23 meter (7′ 4″)