Orca roundup (killer whale news)

Killer whale or Orca: highly intelligent, inquisitive, caring of family, no wonder they fascinate us

The Southern resident killer whale population is on the brink of extinction, but it seems, not for the reason that people thought.

Found along the coast of Washington, Oregon, California, and British Columbia, this population is thought to number just 75, but births are rare, and often end in sadness. 2 calves have been born in the last 2 years, but both have died young. This year, the mother was seen carrying her dead infant for some time (draped across her snout).

It is thought that this population is in danger as a result of a collapse in the Chinook salmon which is an essential part of their diet. However, this theory is defeated, when we look at the Northern resident killer whale population, and notice that they appear to have less access to the salmon. There is lots of shipping noise in their home, which may mean that they are incapable of communicating, which would impact their ability to hunt,

It is true that the origins of their decline lie around 120 years ago, when blackfish (orca as they were then called) were both slaughtered and captured for marine parks. The population on stopped falling fast when Canada banned capture. So is this just the straw that broke the camels back?

Why do captive orca have drooping fins?

Drooping dorsal fins are occasionally seen in the wild, so the split is not totally solid, but it is true, that while most captive orca eventually have a drooping dorsal fin, this is a far rarer site in the wild (while not being unheard of).

The fin is supported by a tough protein called callagen, and it has been suggested that with captive orca spending more time at the surface, the higher temperature from the sun may degrade the protein.

Tahlequah has given birth again (famous for carrying her first calf after it died)

Tahlequah carried a former calf for 17 days after it died, and for more than 1000 miles. This means it is rather lovely to see that she has had another calf. However, the calf has already been observed being pushed by the mother and does not look healthy. The mother is very experienced, so it is hoped that she can succeed, but time will tell. This mother is part of the Southern resident population which i mentioned above, which is small and with few births in recent years. It is therefore very concerning to find that 2 related calves died so close together.

A new video shows a mother orca teaching her calves how to hunt

I should say, that the article I read suggested this was the first time that it had been seen, but the below clip is from several years ago. Even so, it is fascinating to see a mother actively teaching her offspring how to hunt/

Orca have been seen, for the first time off Chile, hunting dolphins

As can be seen from the video above, orca are known to hunt and eat dolphins in various places around the world. However, this behaviour has never been seen in this population, so they had to work out how to do it for themselves. While in the past they have been filmed eating sea lions (and using local boats to hide their approach), they have now been filmed hunting dusky dolphins.

The study was looking at the eating habits of orcas in the southern hemisphere, so as to be able to conserve them more effectively. It suggests that Chile Orca are turning to these food-sources. While Orca have been filmed harrasing or even killing porpoises and dolphins, this is the first time that they have been filmed eating them.

Orca facing uncertain future as the marine zoo shuts

Marineland Antibese near Cannes France, is shutting, after the French government brought in more strict rules of their care. The law was passed in 2021, but comes into force in 2026. It is thought that 90% of the visitors come to see the killer whales and other dolphins, so without them they are not viable.

It is unclear as to what will happen with the Orca. They are from Icelandic waters, but having spent so much time in captivity, would not be able to look after themselves in the wild. A deal had been made to send them to a Japanese park, but there was outcry as their treatment would be worse, so the French government blocked it. There is another zoo in the Canary islands. A facility in Eastern Canada has suggested netting off around 40 hectares of a sea bay for them, where they could live out their lives, in relative comfort, and yet still be looked after by a team of vets and other carers.

Something similar has happened before. Keiko was the orca from the film Free Willy, and was rescued from captivity in 1996 and released into a similar bay in Iceland in 1998. Having spent more time in the wild, though he was able to relearn some skills and in 2002 he left with some wild orca. He swam to Norway, but unfortunately died from an infection in 2003.

Black rhino calf born in Kenya

The eastern black rhino is incredibly endangered, with just 1000 spread across a huge area. In this region, just 8 are known to live, so to see young is incredibly rare.

Rhino horn is incredibly valuable on the far East traditional medicine market, despite the fact that multiple scientific studies have shown that the rhino horn does nothing for humans. Never-the-less, this unmet demand for rhino horn, linked with the huge explosion of wealth in places like China, means that rhino horn is incredible valuable. While eastern black rhino horns rarely weigh more than 3kg, this can still be worth $200,000, which is very tempting, in a country where the average salary is under $200 a month.

As living conditions increase in the area, the desire to poach these animals is likely to decrease. Of course, these rhino are also likely to be worth similar amounts in tourism dollars across their lifetime, but that is a long-term thing, and something that the whole area benefits from (rather than the poacher, who is often struggling to make ends meet – though middlemen are instead making a fortune).

1. Tragelaphini – spiral-horned antelope

1. Tragelaphini - spiral-horned antelope

Bushbuck

The Cape bushbuck , also  known as imbabala is a common, medium-sized and a widespread species of antelope in sub-Saharan Africa. It is found in a wide range of habitats, such as rain forestsmontane forests, forest-savanna mosaic, savanna, bushveld, and woodland. Its stands around 90 cm at the shoulder and weigh from 45 to 80 kg. They are generally solitary, territorial browsers.

Although rarely seen, as it spends most of its time deep in the thick bush, there are around 1 million in Africa

Common Eland

The common eland (southern eland or eland antelope) is a large-sized savannah and plains antelope from East and Southern Africa. An adult male is around 1.6 m  tall at the shoulder (females are 20 cm  shorter) and can weigh up to 942 kg with a typical range of 500–600 kg. Only the giant eland is (on average bigger). It was described by Peter Simon Pallas in 1766. Population of 136,000, can form herds of 500

Common Eland

Giant Eland

Giant Eland

The giant eland, (also known as Lord Derby’s eland and greater eland) is an open-forest and savanna antelope.

 It was described in 1847 by John Edward Gray. The giant eland is the largest species of antelope, with a body length ranging from 220–290 cm (87–114 in). There are two subspecies: T. d. derbianus and T. d. gigas.

The giant eland is a herbivore, living in small mixed gender herds consisting of 15–25 members. Giant elands have large home ranges. They can run at up to 70 km/h.  They mostly inhabit broad-leafed savannas and woodlands and are listed as vulnerable and have a wild population of 12,000-14,000

Greater Kudu

The greater kudu  is a large woodland antelope, you can see its distribution on the map. Despite occupying such widespread territory, they are sparsely populated in most areas due to declining habitat, deforestation, and poaching. 

The spiral horns are impressive, and grow at one curl every 3 years – they are fully grown at 7 and a half years with 2 and a half turns. Three subspecies have been agreed (one described has been rejected) :

  • T. s. strepsiceros – southern parts of the range from southern Kenya to Namibia, Botswana, and South Africa
  • T. s. chora – northeastern Africa from northern Kenya through Ethiopia to eastern Sudan, Somalia, and Eritrea
  • T. s. cottoni – Chad and western Sudan
They are listed as near threatened with 118,000 in the wild
Greater Kudu

Lesser Kudu

The lesser kudu  is a medium-sized bushland antelope found in East Africa.  It was first scientifically described by English zoologist Edward Blyth (1869).It stands around 90 cm at the shoulder and weigh from 45 to 80 kg. They are generally solitary, territorial browsers.

While currently rated not threatened, its population is decreasing. It currently stands at 100,000, but it is loosing territory to humans

Common Bongo (and mountain or Eastern Bongo)

The bongo  is a large, mostly nocturnal, forest-dwelling antelope, native to sub-Saharan Africa. Bongos are characterised by a striking reddish-brown coat, black and white markings, white-yellow stripes, and long slightly spiralled horns. It is the only member of its family in which both sexes have horns. Bongos have a complex social interaction and are found in African dense forest mosaics. They are the third-largest antelope in the world.

The Common (western or lowland bongo), faces an ongoing population decline, and the IUCN considers it to be Near Threatened. The picture to the right is of a common bongo. Beneath that is a short video about a common bongo. The mountain bongo, which is discussed below, has a video below the common bongo.

The mountain bongo (or eastern) of Kenya, has a coat even more vibrant than the common version. The mountain bongo is only found in the wild in a few mountain regions of central Kenya. This bongo is classified by the IUCN  as Critically Endangered (where it breeds readily). (this is not on the map above). Only 100 live wild, split between 4 areas of Kenya

 T

Common Bongo

Nyala

The Nyala is a spiral horned species found in Southern Africa. The nyala is mainly active in the early morning and the late afternoon. It generally browses during the day if temperatures are 20–30 °C  and during the night in the rainy season. The nyala feeds upon foliage, fruits and grasses, and requires sufficient fresh water. It is a very shy animal, and prefers water holes to the river bank. Not territorial, they are very cautious creatures. They live in single-sex or mixed family groups of up to 10 individuals, but old males live alone. They inhabit thickets within dense and dry savanna woodlands. The main predators of the nyala are lion, leopard and African wild dog, while baboons and raptorial birds prey on juveniles. Males and females are sexually mature at 18 and 11–12 months of age respectively, though they are socially immature until five years old. They have one calf after 7 months of gestation. Its population is stable, with the greatest threat coming from habitat loss as humans expand. There are thought to be 36500 and the population is stable.

Mountain Nyala

 The mountain Nyala (also known as the Balbok) is a large antelope found in high altitude woodlands in just a small part of central Ethiopia. The coat is grey to brown, marked with two to five poorly defined white strips extending from the back to the underside, and a row of six to ten white spots. White markings are present on the face, throat and legs as well. Males have a short dark erect crest, about 10 cm (3.9 in) high, running along the middle of the back. Only males possess horns.

The mountain nyala are shy and elusive towards human beings. They form small temporary herds. Males are not territorial. Primarily a browser. They will grazing occasionally. Males and females are sexually mature at 2 years old.. Gestation lasts for eight to nine months, after which a single calf is born. The lifespan of a mountain nyala is around 15 to 20 years.

Found in mountain woodland -between 3000m and 4000m. Human settlement and large livestock population have forced the animal to occupy heath forests at an altitude of above 3,400 m (11,200 ft). Mountain nyala are endemic to the Ethiopian highlands east of the Rift Valley. As much as half of the population live within 200 square km (77 sq mi) area of Gaysay, in the northern part of the Bale Mountains National Park. The mountain nyala has been classified under the Endangered category of the  (IUCN). Their influence on Ethiopian culture is notable, with the mountain nyala being featured on the obverse of Ethiopian ten cents coins.

Mountain Nyala

Sitatunga Antelope

Situnga

The sitatunga  (or marshbuck)is a swamp-dwelling medium-sized antelope found throughout central Africa (see the map to the right. The sitatunga is mostly confined to swampy and marshy habitats. Here they occur in tall and dense vegetation as well as seasonal swamps, marshy clearings in forests, riparian thickets and mangrove swamps.

The scientific name of the sitatunga is Tragelaphus spekii. The species was first described by the English explorer John Hanning Speke in 1863.

It is listed as least concern with 170,000-200,000, and are found in 25 countries. However 40% live outside reserves, so the situation could get worse fast.

Note: these animals have been dealt with in less detail than others. Should you be interested in finding out if I have written on these animals or what exactly I said, you can find a list of articles about each below its information.

Whales, Dolphins and Porpoises family tree

Cetaceans -Whales, porpoise and dolphins

Few people can avoid stopping to watch, if they spot cetaceans from a cliff. While the family is wide and varied, they are all pretty interesting. From some of the largest and most intelligent hunters such as killer whales to the largest animal on earth the blue whale.

Whale and dolphin watching tourism is worth a lot of money – this can be essential, as in many places the extra money helps a community survive. 

I hope, overtime, to make this section of the website as large a list of places to view cetaceans and people who will help you in that quest.

As might perhaps be suspected, all of the mammal species which have returned permanently to the sea, and developed breathing holes located on their back (and therefore perfectly placed for taking quick breaths) are  related.

So what is the most closely related living land mammal? Perhaps obviously, it is a species which spends much time in the water – the hippopotamus.

As with all of these pages, as we create pages for each individual species, they will be linked to the photo below.

So the baleen whales are split into three families, these are not large as there are only 16 species of baleen whales in the world. At the current time, there are roughly 1.1 million baleen whales in the worlds oceans

Below is a family tree of the group

 

Baleen Whales

Baleenideae – the rhight whales

 

The first  living split is Baleenidae, this family is not huge. The north atlantic and north pacific are closest related, these species are closely related to the Southern pacific right whales. Their name is unfortunate – it is called right whale for 3 reasons, it swims slowly, floats when dead and carries a large amount of oil. This lead to all these species being hunted close to extinction.

The other family is called Balaenopteroidea. Here species peel off slowly. I will list them in the order that they split.

The first split is the minke whale – of which there are 2 species, the common and southern minke whale, with the grey whale being the next most similar.

The next are the humpback whale and the fin whale followed by the Blue whale.

The last group of whales are from a group called the Brydes whales complex

This completes the list of baleen whales. The other branch of the Cetaceans is known as the toothed whales

Toothed Whale

.I am going to look at them in 3 groups, though the third is not particularly closely related to each other

  • Delphinoidea: This includes
    • Monodontidaes – Belugas and narwhals
    • Phocoenidae – The family of Porpoises (7 species) such as harbour porpoises and Vanquita

 

    • Delphininidae – these are the oceanic dolphins – 37 species split into several subfamilies which we will deal with one by one.
Subfamily Delphininae – 15 species (tamanend bottle nose dolphin only recognized as separate species, will build page for it at some point when photos are readily available.

Subfamily  Globcephalinae 11 species

Subfamily incerta sedis (latin for “of uncertain placement” )6 species

Subfamily Lissodelphininae 6 sppecies

Subfamily Orcininae

  • Inioidea : This includes 3 groups
    • Iniidae (only 1 of 5 genus remains -Inea (4 species: Araguaian river dolphin, Bolivian river dolphin  and Orinoco dolphin)
    • Lipotidae: which contains only one species: the Baiji or Chinese river dolphin
  • Pontoporiidae: which contains one species 

The next family is the beaked whales. There are 24 species, of which only 3-4 have been well studied. This is because they spend much of their time deep in the sea, it appears that each species does not have many members and they are incredibly reclusive in their habits.

One might ask how an air breathing animal can spend so much of its time deep in the ocean? Well the Curved beaked whale has had a dive timed at 138 minutes. More incredible, they only need around 2 minutes to catch their breathe before sinking back into the depths. This means that if required, they can spend just 20 minutes out of 24 hours at the surface – an incredible stunt.

There appear to be a great number of species that are extinct – these we will not list, but will mention each subfamily in passing.

Incertae sedis contains 5 extinct genus, Basal forms include 13 extinct genus

Subfamily Berardiinae contains 3 genus, 2 of which are extinct, but the third contains 3 living species (and one dead) .  

Genus Beradius

 

Next we cover the Bottlenose whales

Northern                                                                                                                     Southern and                                                        Tropical

Subfamily Ziphiinae  contains 5 genus, 3 are extinct, but two have just one species in each

Genus Tasmacetus: Shepherds beaked whale Genus Ziphius: Cuviers beaked whale

Click on the image to see it in full

As you can see from the whale family tree, the sperm whales are separate from the rest. However, they are toothed whales so belong in this section of the page.

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