Tag: Nocturnal

Spinner Dolphin

Spinner dolphin

The spinner dolphin (also known as the long-snouted dolphin (distinguishing it from the Clymene dolphin – which is often called the short snouthed spinner dolphin) is a small dolphin found in off-shore tropical waters around the world. It is famous for its spinning  along its length, as it leaps from the water. It is a member of the family Delphinidae of toothed whales.

The four named subspecies are:

  • Eastern spinner dolphin, found from the tropical eastern Pacific.
  • Central American or Costa Rican spinner dolphin, also found in the tropical eastern Pacific.
  • Gray’s or Hawaiian spinner dolphin, from the central Pacific Ocean around Hawaii but represents a mixture of broadly similar subtypes found worldwide.
  • Dwarf spinner dolphin, first found in the Gulf of Thailand.

The species, though, displays greater variety than these subspecies might indicate. A hybrid form characterized by its white belly inhabits the eastern Pacific. Other less distinct groupings inhabit other oceans.The species name comes from the Latin word for “long-beaked.”

Spinner dolphins are small cetaceans with a slim build. Adults are 129–235 cm long and weigh 23–79 kg. This species has an elongated rostrum and a triangular or subtriangular dorsal fin. Spinner dolphins generally have three colours, one on the dorsal fin, one on the underside and one on the upper-side. Also, a dark band runs from the eye to the flipper, bordered above by a thin, light line. However, the spinner dolphin has more geographic variation in form and coloration than other cetaceans. In the open waters of eastern Pacific, dolphins have relatively small skulls with short rostra. A dwarf form of spinner dolphin occurs around southeast Asia. In these same subspecies, a dark dorsal cape dims their tripartite colour patterns Further offshore, subspecies tend to have a paler and less far-reaching cape.] In certain subspecies, some males may have upright fins that slant forward.[8] Some populations of spinner dolphin found in the eastern Pacific have backwards-facing dorsal fins, and males can have dorsal humps and upturned caudal flukes.

The spinner dolphin lives in nearly all tropical and subtropical waters between 40°N and 40°S. The species primarily inhabits coastal waters, islands, or banks. However, in the eastern tropical Pacific, spinner dolphins live far from shore. Some studies suggest they use different areas at different times of the year.

The spinner dolphin feeds mainly on small mesopelagic fish, squids, and sergestid shrimps, and will dive 200–300 m to feed on them. Spinner dolphins of Hawaii are nocturnal feeders and forage in deep scattering layers, which contain many species. The dwarf spinner dolphin may feed mostly on benthic fish in reefs and shallow water. Off Oahu, Hawaii, spinner dolphins forage at night and cooperatively herd their prey into highly dense patches. They swim around the prey in a circle and a pair may swim through the circle to make a catch. Spinner dolphins are in turn preyed on by sharks. Other possible predators include the killer whale, the false killer whale, the pygmy killer whale and the short-finned pilot whale. They are susceptible to parasites, and are known to exhibit both external ones like barnacles and remoras as well as internal parasites.


Due to the spinner dolphin foraging and feeding at night, in certain regions, such as Hawaii and northern Brazil, dolphins spend the daytime resting in shallow bays near deep water. Spinner dolphins rest as a single unit, moving back and forth slowly in a tight formation but just out of contact with one another. These resting behaviours are observed for about four to five hours daily. During rest periods, spinner dolphins rely on vision rather than echolocation. At dusk, they travel offshore to feed. They travel along the shore during foraging trips, and the individuals that occupy the same bay may change daily. Some individual dolphins do not always go to a bay to rest; however, in Hawaii, dolphins do seem to return to the same site each trip.

Spinner dolphins live in an open and loose social organization. The spinner dolphins of Hawaii live in family groups, but also have associations with others beyond their groups. Mothers and calves form strong social bonds. Spinner dolphins seem to have a promiscuous mating system, with individuals changing partners for up to some weeks. A dozen adult males may gather into coalitions. Vocalizations of spinner dolphins include whistles, which may be used to organize the school, burst-pulse signals, and echolocation clicks. The spinner dolphin has a 10-month gestation period, and mothers nurse their young for one to two years. Females are sexually mature at four to seven years, with three-year calving intervals, while males are sexually mature at seven to 10 years. Spinner dolphins live for about 20-25 years old. Breeding is seasonal, more so in certain regions than others.

Although most spinner dolphins are found in the deeper waters offshore of the islands, the rest of the Hawaiʻi population has a more coastal distribution. During daytime hours, the island-associated stocks of Hawaiian spinner dolphins seek sanctuary in nearshore waters, where they return to certain areas to socialize, rest, and nurture their young.

They get their name for their spinning jumps, a spinner dolphin comes out of the water front first and twists its body as it rises into the air. When it reaches its maximum height, the dolphin descends back into the water, landing on its side. A dolphin can make two to seven spins in one leap; the swimming and rotational speed of the dolphin as it spins underwater affects the number of spins it can do while airborne. These spins may serve several functions. Some of these functions are believed by experts to be acoustic signalling or communication. Another reason is to remove ectoparasites such as remoras. Dolphins may also make nose-outs, tail slaps, flips, head slaps, “salmon leaps”, and side and back slaps.

The protected status of spinner dolphins are CITES Appendix II and Marine Mammal Protection Act (MMPA) protected throughout its range as well as MMPA depleted in its eastern stock. Tens of thousands of spinner dolphins, mostly eastern and white-bellied varieties, were killed in the 30 years after purse seine fishing for tuna began in the 1950s; The process killed probably half of all eastern spinner dolphins. They have also been contaminated by pollutants such as DDT and PCBs. Spinner dolphins, as with other species affected by ETP tuna purse-seine fishing, are managed nationally by the coastal countries and internationally by the IATTC. The IATTC has imposed annual stock mortality limits on each purse seine and promulgated regulations regarding the safe release of dolphins. The eastern tropical Pacific and Southeast Asian populations of the spinner dolphin are listed on Appendix II of the Convention on the Conservation of Migratory Species of Wild Animals (CMS), since they have an unfavourable conservation status or would benefit significantly from international co-operation organized by tailored agreements. In addition, the spinner dolphin is covered by Memorandum of Understanding for the Conservation of Cetaceans and Their Habitats in the Pacific Islands Region (Pacific Cetaceans MoU) and the Memorandum of Understanding Concerning the Conservation of the Manatee and Small Cetaceans of Western Africa and Macaronesia (Western African Aquatic Mammals MoU). Spinner dolphins are susceptible to disease and two of the recorded diseases within them are toxoplasmosis and cetacean morbillivirus. The number of cases reported however is fairly low in the species.

Spinner dolphins in Hawaii receive multiple daily visits to their near-shore resting grounds, with boats taking people out daily to snorkel and interact with the local dolphin population. Such activities are increasingly coming under criticism on the grounds of possible harm to the dolphins, and efforts are being made both to educate the public in order to minimise human impact on the dolphins, and to bring in regulations to govern these activities. In 2023, 33 swimmers were arrested for reportedly harassing dolphins off the coast of the Big Island of Hawaii. The swimmers reportedly broke federal law by swimming within 45 meters (50 yards) of the dolphins. The ban went into effect in 2021 due to dolphins not getting enough rest during the day to forage for food at night. The swimmers were caught by drone footage pursuing the dolphins as they tried to escape.

We are eager to work with people who run boats to see these animals – provided they are run with due care for the animals. Do get in touch, or fill in a form you will find in ‘List your wild place’ at the top of the page (or click here).

Aardwolf

Aardwolf

The aardwolf is the smallest member of the Hyaenidae family, as you can see from the map, it is a species with two separated populations, one in East Africa and one in Southern Africa. It is insectivorous, and exclusively nocturnal, and is generally thought of as one of the harder animals to see in the wild. If incredibly lucky, you can see them feeding alongside Aardvarks, and even Pangolins, but this is rare.  They favour open dry plains and savannahs.

Looking at first glance rather similar to a thin striped hyena, but with a black mane running from its neck, down its back, it can raise this during a confrontation. 

As it ages, it can loose its teeth, however, due to the softness of most insects, this is not the death sentence that it is in many wild animals.

They will defend a territory from others, that covers 1-4 square km, during the breeding season, but are solitary the rest of the time. Both sexes mark their territory, and they will maintain as many as 10 dens throughout their territory, giving them a nearby bolt-hole should danger approach.

They are careful not to destroy a nest that they raid, and will remember where they are, so that they can return for another meal a few months later.

They generally have a density of 1 per square km at most (though this is far higher than animals like lions.

While some farmers mistakenly kill them, thinking that they threaten their livestock, their diet of insects is often good for the farm animals. Their hide is worth a little.

Below is a video of this species and below this is a list of any articles that mention this species. When we have more contacts, you will find them below the news section.

Primate family tree main and great and lesser apes

Primate family tree

Great apes
Lesser apes
Old world monkeys
Lemurs
New world monkeys
Lorisidae & allies
Tarsiaforms

The primates are in some ways one of the most successful families. It is true that many are now endangered, however, unfortunately, that is as a result of the run-away success of the most successful member of the primate family us! Having left the rainforests behind, we have been reducing their coverage dramatically over the last few centuries. 

The sad thing, is that while we have pushed many of our closest cousins towards extinction, the loss of forests may well cost us dearly in the future as well. As a species, we need to pull together to meet this challenge. in order to jump to the various families, click on the family of interest above – though all can also be reached by scrolling down.

Great Apes

Chimpanzee
Boonobo
Sumatran Orangutan
Borneon Orangutan
Tapunali Orangutan
Humans on the beach
Eastern Lowland gorilla
Mountain Gorilla
Western lowland gorilla
Cross river gorilla

Great ape Family split is thought to have split from its nearest relative – the gibbon family, around 17 million years ago.

4 million years later the Orangutan family split from the gorilla line and the human/chimp line.

3 million years after this (so around 10 million years ago) the gorilla family split from the Homo (humans) and Pan

Finally the human line (homo) split from the Pan line 5-6 million years ago.

It should be noted, that chimpanzees and Bonobos split from a common ancestor just 1.8 million years ago. This occurred as the two populations ceased to be able to have contact with each other – the Congo rive formed between 1.5 and 2 million years ago.

For more information on each species, click on their photo and this will take you to their page

It should be noted that while I have grouped eastern western and skywalker gibbon together, there is some contention that the skywalker gibbon should be in its own genus, having diverged around half a million years aog

Gibbons

siamang gibbon genus Symphalangus
hookock gibbon (Eastern, Western and Skywalker) Genus Hoolock
genus Normascus (crested gibbon)
Genus Hylobates (dward gibbons) Agile gibbon

Genus Nomascus

This family is the Genus: Nomascus or crested gibbon.

The last Genus of gibbons is Hylobates: dwarf gibbons.

Side striped jackal

Side-striped jackal

The side striped jackal is found across a larger area than the black backed jackal, but are generally harder to see in the places where they are found. I have been lucky enough to see

them once or twice, in the Kruger. They are generally easier to spot when you are further north in the park (or at least we found that).

Mostly nocturnal, they are (like the black backed jackals) scavengers and will eat almost anything that they come across. They are omnivorous so can take advantage of fruit and other things that they will find. In terms of prey, they are capable of killing smaller antelope, as well as springhare and small mammals in the dry months, while in the wet months they eat a large amount of invertabrates.

They are also larger than the black backed jackals, but are naturally timid.

In terms of advice on seeing them, make sure you are in a reserve where they are found, and then try to find yourself in an area with less traffic. We have found, that while sightings are less common, they are often more exciting when they do occur.

Golden Jackal

European golden jackal

Golden Jackal

The Golden jackal is a species found across the south eastern part of Europe as well as throughout much of southern Asia. It is the animal which the African wolf was confused with, and the reason that it was described as a species so recently.

 

Despite its name, the Golden jackal is not closely related to the African Black-backed jackal or Side-striped jackal, which are part of the genus Lupulella, being instead closer to wolves and coyotes. The ancestor of the Golden jackal is believed to be the extinct Arno river dog that lived in southern Europe 1.9 million years ago. It is described as having been a small, jackal-like canine. Genetic studies indicate that the Golden jackal expanded from India around 20,000 years ago, towards the end of the last Last Glacial Maximum. The oldest Golden jackal fossil, found at the Ksar Akil rock shelter near Beirut, Lebanon, is 7,600 years old. The oldest golden jackal fossils in Europe were found in Greece and are 7,000 years old.

Golden jackals live eight to nine years in the wild and up to 16 in captivity.

Living nearby human settlements, Golden jackals are strictly nocturnal. However, those living in other areas can be partly diurnal. They generally live in pairs or as a family unit. Living in pairs, the jackals share most of their activity with their partners. By hunting together they are three times more successful, than hunting alone. Jackal families hunt on a territory of about 2-3 sq. km. all year round. Looking for shelter, they frequently use caverns, dug by other animals. Golden jackals can also dig caverns themselves as well as use crevices in rocks. They are very friendly to their partners. Scratching one another all over their bodies is a common activity between mates. Nevertheless, once strange jackals encounter each other, their behaviour shows subordination, domination, and even readiness to attack.

Cougar (Puma, mountain-lion, Catamount even Panther)

A mountain-lion photographed in Glacier national park, by the national parks service

Cougar, Puma or mountain-lion

This cat is a large cat that is native to much of North and South America, second only to the Jaguar.

For most classifications, the cougar misses out on being a big cat, as it does not have the vocal structure to roar, as the others do.

It is largely solitary, and is generally a nocturnal or crepuscular cat (that is active at night or in the early morning and late evening). They have been persecuted since the colonization of north America by the Europeans, which has lead to patchy coverage. The Eastern Cougar is extinct, except for a sub-population called the Florida Panther which is isolated from any other Cougars. It is in better state in the west of the USA. In Southern and central America, it is still found in every country. In fact, it holds a classification of being the most widespread mammal to be found in the Western hemisphere.

It is a close relative of the Cheetah, which is believed to have initially evolved in the USA before migrating into Asia and Africa. The only animal which shares the same clade is the jaguarundi is the cougar, though the larger family called a Lineage and does include the cheetah

Flat-headed cat

Flat-headed cat

Flat-headed cat

Found on the Malay peninsular, as well as Borneo and Sumatra, the flat-headed cat is (like so many cats on this list) threatened with extinction, mostly as a result of habitat, which is being turned into farmland, palm oil plantations and human settlements.

Little is known about the wild behaviour of this cat – while it is thought to be nocturnal, in captivity it proved to be crepescular (that is active in early morning and late afternoon.

Caracal

Caracals are a very lucky sighting, as they tend to be active when people are asleep

Caracal

Caracals are nocturnal, which means that they are often not spotted. Indeed, in our time in South Africa, it was the only local cat which we did not see. It has a huge distribution, which includes Africa, the middle east, central Asia and even parts of northern India and Pakistan. It is an expert jumper, and often catches birds in flight, being able to jump more than 3m straight up. It comes from the same genetic line as the serval and the African Golden cat.

Generally, while it is wide spread and usually relatively plentiful it is an animal that either takes a lot of luck or a great deal of patience to see it in the wild.

Serval

Serval

The Serval is a cat slightly bigger than domestic cats. It is a formidable jumper, and uses this to its advantage. It will usually hunt some rodents by stalking them until it is close and then leaping in the air and coming down on its back. It is also one of the few cats that regularly catches birds in flight, given its ability to jump as much as 4m up (indeed, if you see them in a zoo, it is not unusual for there to be a pile of feathers somewhere in their enclosure. The are a nocturnal savannah animal, and are found in most protected areas of sub-Saharan Africa. They are generally plentiful in any savannah with a good supply of water.

aaa Swedish lapland

Swedish Lapland, far north of sweden

Sweden’s Lapland is a beautiful area. Lying in the far north of Sweden, like much of Sweden the land is heavily forested. Wolves are rare in Sweden, though this is as a result of over hunting – Europe has said that Sweden needs 170-270 wolves for a healthy population. Sweden is a huge country, which could support far more if they were allowed to naturally control their numbers. Being a country about the size of France, but with far fewer people, stating the country can only support 170 wolves is ridiculous. Bear numbers are higher, and there are thought to be around 2000 wolverines within its border (this was a population I was quoted if we visited).

It should be noted, that, the only difference between here and further south, is the number of wolverines – we did not get this far north, and where we were wolverines are just occasional visitors. The one difference is the reindeer presence. There are around 260,000 reindeer in Sweden, though it should be noted that these are only semi wild.

Sweden’s bear population is going up at the moment, and is currently thought to be around 2800. Generally, it takes some local knowledge to see wild bears, and your best chance is in a bear hide. We have one listed in the hides section of of this website. One of the big advantages of doing this in the northern parts of Sweden is the sunlight lasts more of the night. As bears are largely nocturnal, this allows more time to watch. When I visited the bear hide, it got to dark to see at about 2am but got light enough again at 5am.

Below is a video of the area. As you can see, while there is some wildlife, there is not a great deal. Generally you need a guide to take you out as finding the wildlife is a difficult job. We hope to be adding plenty of links below.

See Animals Wild