555–569.

In light of their study, the researchers believe that orcas may congregate each year off the coast of Western Australia to prey on baby humpback whales. Sci. For example, humpback whales are among the most studied large whales, being observed for countless hours at sea by scientists. Diane recounts what happened: “We were out early on a windy day doing surveys when we noticed over 40 walruses rushing to shore. Ivkovich, T.V., Population Structure of Killer Whales, Orcinus orca, in Avachinskaya Bay, M.S. 304–308. They observed orcas attempting 22 separate attacks on humpback whales. & Ivanov, D.I.

On average, each killer whale attacked the walrus seven times.

Grachev, A.I., Gorshunov, M.B., and Mymrin, R.N., Killer Whales (Orcinus orca) in Coastal Waters off the Chukchi Peninsula, Tez. Two killer whales tried to kill walruses by chasing them and jumping out of the water on the shore. konf. V Int. Conf. Orcas have developed a reputation for preying on baleen whales, a group that includes blue, fin and humpback whales among others.

They have been recorded attempting to attack almost every species, and also sperm whales, the largest species of toothed whale. II mezhdunar. konf. A week later, a dead walrus came to shore, and its body was covered in bruises.
On average, each killer whale attacked the walrus seven times. The attack tactics of killer whales, the number of movements, and the location of killer whales (adults and calves) relative to each other and to the walrus were described. The whales eventually drifted away and the walruses disappeared in the whitecaps. Google Scholar. Each with big jaws, full of teeth. 16th Biennial Conf. 31, 1981, p. 521. https://doi.org/10.1134/S106235901209004X. In 2006, Alaska Fish and Game staff Diane and Brian Okonek had a rare opportunity to witness a dramatic killer whale and walrus event in the waters just off Round Island, home of the explore.org Walrus Cam. But the presence of the escorts did reduce how many times a whale calf was killed. Research over recent decades has also revealed a range of orca populations around the world, each hunting different prey using different techniques. According to Walrus the walrus’ natural predators are Killer whales and Polar bears. III Int. Kryukova, N.V., Kruchenkova, E.P. But until now there was no scientific record of an orca killing a humpback whale. 3, pp. konf. Baleen whales themselves are popularly thought to be large but generally unassuming, passive creatures. “Holarctic Marine Mammals,” Lake Baikal, Russia, September 10–15, 2002), Moscow: SMM, 2002, pp. Sci., 2001, vol. Many don't hunt whales at all. © Copyright 2020 This is a preview of subscription content, log in to check access. © 2020 Springer Nature Switzerland AG. “Holarctic Marine Mammals,” Koktebel, the Crimea, Ukraine, October 11–17, 2004), 2004, pp. Zenkovich, B.A., About the Killer Whale, Grampus orca L., Priroda (Moscow), 1938, no. Original Russian Text © N.V. Kryukova, E.P. They managed to stay in a tight huddle throughout the event. Perhaps most surprising, humpback whales also have adult "escorts" that try to protect calves that are not their own, joining the mother in defending the smaller whale.

“Morskie mlekopitayushchie Golarktiki” (Odessa, Ukraina 14–18 oktyabrya 2008 g.) (Collected Works: Proc. 413–417. For a start it has been unclear whether orcas, also known as killer whales, really hunt whales, and how often. 91, No. Mammal., 1985, vol. The video analysis of the “attack phase” showed that killer whales made 55 attacks on the walrus during 17.3 min. Mamm. trudov po materialam V mezhdunar. Walruses don’t have many predators, but killer whales are among them. These escort whales either charged at the orcas, or placed themselves between the attackers and calf, thrashing their tails and flippers. konf. Conf. Nor did we know how the whales themselves might react to such attacks. The whales divided out a group of 3 walruses (see photo below). 6, pp. Maniscalco, J.M., Matkin, C.O., Maldini, D., Calkins, D.G., and Atkinson, S., Assessing Killer Whale Predation on Steller Sea Lions from Field Observations in Kenai Fjords, Alaska, Mar. Vladimirov, A., An Attack of Killer Whales (Orcinus orca) on a Mother-Calf Pair of Western Gray Whales in the Water of Northeastern Sakhalin Island, Russia, Abstr. 1300–1311. That suggests that, for this population of orcas at least, humpback whales are a predictable and plentiful prey, although the orcas were only seen attacking calves and not adult whales. Under the waves cruises a pod of orcas, huge, sleek predators, each around 8 metres long and weighing some 6 tonnes. The main behavioral patterns of killer whales during the hunt were discerned. The Great white shark would likely beat the walrus, particularly if it surprised it. What's more, the humpback whales themselves aren't passive victims. The results are published in the journal Marine Mammal Science. Nikulin, P.G., Far Eatern Marine Mammals: The Chukchi Walrus, Izv. “Morskie mlekopitayushchie Golarktiki” (Sankt-Peterburg, Rossiya, 10–14 sentyabrya 2006 g.) (Collected Works: Proc. trudov po materialam V mezhdunar. konf. Made possible by the Annenberg Foundation.

“Morskie mlekopitayushchie Golarktiki” (Odessa, Ukraina, 14–18 oktyabrya 2008 g.) (Collected Works: Proc. The largest male whale circled at a distance while the rest of the whales began tail-slapping the walruses from above and below, sometimes lifting the walruses up in the water. - 122.201.121.241. 21, no. The total duration of their hunt activity was not less than 95 min. Burdin, A.M., The Commander and Aleutian Islands: Stability and Degradation of Marine Mammal Populations, in Sb. “Morskie mlekopitayushchie Golarktiki” (Odessa, Ukraina, 14–18 oktyabrya 2008 g.) (Collected Works: Proc. When chased by orcas, certain species of baleen whale are known to try to outswim their pursuers. During the seven attacks in which the researchers witnessed the outcome, the orcas killed the humpback whale calf on three occasions. Such life-or-death battles, between orcas and whales, have captured the popular imagination. It is not yet clear whether escort whales are related to the calves and if not, how they might benefit from defending them. Biology Bulletin From their secret lives in the kelp to having super powers that helped it 'defeat' Megalodon, it even has the story arc of having a kryptonite. Kryukova, N.V., Pereverzev, A.A., Kochnev, A.A., and Ivanov, D.I., Marine Mammals in Coastal Waters of Northern Anadyr Gulf, the Bering Sea, in the Summer of 2007, in Sb. 109–112. But at other times, the humpback whales decided to stay and fight.

and Dill, L.M., Occurrence and Behaviour of Transient Killer Whales: Seasonal and Pod-Specific Variability, Foraging Behaviour, and Prey Handling, Can. “Morskie mlekopitayushchie Golarktiki” (Baikal, Rossiya, 10–15 sentyabrya 2002 g.) (Abstr. Dissertation, Moscow, 2008. Perhaps they were head-butting them from below but, of course, we couldn’t document this. Robert Pitman, a marine biologist based at the US National Oceanic and Atmospheric Administration, in La Jolla, California and colleagues from the US and Australia, tracked orcas and humpback whales off the coast of Western Australia. Walruses are no match for killer whales in hot pursuit. “Morskie mlekopitayushchie Golarktiki” (Sankt-Peterburg, 10–14 sentyabrya 2006 g.) (Collected Works: Proc. and Zagrebin, I.A., Killer Whale Predation in Coastal Waters of the Chukotka Peninsula, Mar. The group of killer whales consisted of seven adults (one adult male did not participate in attacks) and two calves.
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555–569.

In light of their study, the researchers believe that orcas may congregate each year off the coast of Western Australia to prey on baby humpback whales. Sci. For example, humpback whales are among the most studied large whales, being observed for countless hours at sea by scientists. Diane recounts what happened: “We were out early on a windy day doing surveys when we noticed over 40 walruses rushing to shore. Ivkovich, T.V., Population Structure of Killer Whales, Orcinus orca, in Avachinskaya Bay, M.S. 304–308. They observed orcas attempting 22 separate attacks on humpback whales. & Ivanov, D.I.

On average, each killer whale attacked the walrus seven times.

Grachev, A.I., Gorshunov, M.B., and Mymrin, R.N., Killer Whales (Orcinus orca) in Coastal Waters off the Chukchi Peninsula, Tez. Two killer whales tried to kill walruses by chasing them and jumping out of the water on the shore. konf. V Int. Conf. Orcas have developed a reputation for preying on baleen whales, a group that includes blue, fin and humpback whales among others.

They have been recorded attempting to attack almost every species, and also sperm whales, the largest species of toothed whale. II mezhdunar. konf. A week later, a dead walrus came to shore, and its body was covered in bruises.
On average, each killer whale attacked the walrus seven times. The attack tactics of killer whales, the number of movements, and the location of killer whales (adults and calves) relative to each other and to the walrus were described. The whales eventually drifted away and the walruses disappeared in the whitecaps. Google Scholar. Each with big jaws, full of teeth. 16th Biennial Conf. 31, 1981, p. 521. https://doi.org/10.1134/S106235901209004X. In 2006, Alaska Fish and Game staff Diane and Brian Okonek had a rare opportunity to witness a dramatic killer whale and walrus event in the waters just off Round Island, home of the explore.org Walrus Cam. But the presence of the escorts did reduce how many times a whale calf was killed. Research over recent decades has also revealed a range of orca populations around the world, each hunting different prey using different techniques. According to Walrus the walrus’ natural predators are Killer whales and Polar bears. III Int. Kryukova, N.V., Kruchenkova, E.P. But until now there was no scientific record of an orca killing a humpback whale. 3, pp. konf. Baleen whales themselves are popularly thought to be large but generally unassuming, passive creatures. “Holarctic Marine Mammals,” Lake Baikal, Russia, September 10–15, 2002), Moscow: SMM, 2002, pp. Sci., 2001, vol. Many don't hunt whales at all. © Copyright 2020 This is a preview of subscription content, log in to check access. © 2020 Springer Nature Switzerland AG. “Holarctic Marine Mammals,” Koktebel, the Crimea, Ukraine, October 11–17, 2004), 2004, pp. Zenkovich, B.A., About the Killer Whale, Grampus orca L., Priroda (Moscow), 1938, no. Original Russian Text © N.V. Kryukova, E.P. They managed to stay in a tight huddle throughout the event. Perhaps most surprising, humpback whales also have adult "escorts" that try to protect calves that are not their own, joining the mother in defending the smaller whale.

“Morskie mlekopitayushchie Golarktiki” (Odessa, Ukraina 14–18 oktyabrya 2008 g.) (Collected Works: Proc. 413–417. For a start it has been unclear whether orcas, also known as killer whales, really hunt whales, and how often. 91, No. Mammal., 1985, vol. The video analysis of the “attack phase” showed that killer whales made 55 attacks on the walrus during 17.3 min. Mamm. trudov po materialam V mezhdunar. Walruses don’t have many predators, but killer whales are among them. These escort whales either charged at the orcas, or placed themselves between the attackers and calf, thrashing their tails and flippers. konf. Conf. Nor did we know how the whales themselves might react to such attacks. The whales divided out a group of 3 walruses (see photo below). 6, pp. Maniscalco, J.M., Matkin, C.O., Maldini, D., Calkins, D.G., and Atkinson, S., Assessing Killer Whale Predation on Steller Sea Lions from Field Observations in Kenai Fjords, Alaska, Mar. Vladimirov, A., An Attack of Killer Whales (Orcinus orca) on a Mother-Calf Pair of Western Gray Whales in the Water of Northeastern Sakhalin Island, Russia, Abstr. 1300–1311. That suggests that, for this population of orcas at least, humpback whales are a predictable and plentiful prey, although the orcas were only seen attacking calves and not adult whales. Under the waves cruises a pod of orcas, huge, sleek predators, each around 8 metres long and weighing some 6 tonnes. The main behavioral patterns of killer whales during the hunt were discerned. The Great white shark would likely beat the walrus, particularly if it surprised it. What's more, the humpback whales themselves aren't passive victims. The results are published in the journal Marine Mammal Science. Nikulin, P.G., Far Eatern Marine Mammals: The Chukchi Walrus, Izv. “Morskie mlekopitayushchie Golarktiki” (Sankt-Peterburg, Rossiya, 10–14 sentyabrya 2006 g.) (Collected Works: Proc. trudov po materialam V mezhdunar. konf. Made possible by the Annenberg Foundation.

“Morskie mlekopitayushchie Golarktiki” (Odessa, Ukraina, 14–18 oktyabrya 2008 g.) (Collected Works: Proc. The largest male whale circled at a distance while the rest of the whales began tail-slapping the walruses from above and below, sometimes lifting the walruses up in the water. - 122.201.121.241. 21, no. The total duration of their hunt activity was not less than 95 min. Burdin, A.M., The Commander and Aleutian Islands: Stability and Degradation of Marine Mammal Populations, in Sb. “Morskie mlekopitayushchie Golarktiki” (Odessa, Ukraina, 14–18 oktyabrya 2008 g.) (Collected Works: Proc. When chased by orcas, certain species of baleen whale are known to try to outswim their pursuers. During the seven attacks in which the researchers witnessed the outcome, the orcas killed the humpback whale calf on three occasions. Such life-or-death battles, between orcas and whales, have captured the popular imagination. It is not yet clear whether escort whales are related to the calves and if not, how they might benefit from defending them. Biology Bulletin From their secret lives in the kelp to having super powers that helped it 'defeat' Megalodon, it even has the story arc of having a kryptonite. Kryukova, N.V., Pereverzev, A.A., Kochnev, A.A., and Ivanov, D.I., Marine Mammals in Coastal Waters of Northern Anadyr Gulf, the Bering Sea, in the Summer of 2007, in Sb. 109–112. But at other times, the humpback whales decided to stay and fight.

and Dill, L.M., Occurrence and Behaviour of Transient Killer Whales: Seasonal and Pod-Specific Variability, Foraging Behaviour, and Prey Handling, Can. “Morskie mlekopitayushchie Golarktiki” (Baikal, Rossiya, 10–15 sentyabrya 2002 g.) (Abstr. Dissertation, Moscow, 2008. Perhaps they were head-butting them from below but, of course, we couldn’t document this. Robert Pitman, a marine biologist based at the US National Oceanic and Atmospheric Administration, in La Jolla, California and colleagues from the US and Australia, tracked orcas and humpback whales off the coast of Western Australia. Walruses are no match for killer whales in hot pursuit. “Morskie mlekopitayushchie Golarktiki” (Sankt-Peterburg, 10–14 sentyabrya 2006 g.) (Collected Works: Proc. and Zagrebin, I.A., Killer Whale Predation in Coastal Waters of the Chukotka Peninsula, Mar. The group of killer whales consisted of seven adults (one adult male did not participate in attacks) and two calves.
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orca vs walrus


V Int. They are hunting a great baleen whale, one of the largest animals that has ever lived. 335–336. explore.org. 79–80. … trudov po materialam III mezhdunar. But with a few notable exceptions, including times when orcas have preyed upon grey whale calves, successful attacks by orcas on whales have rarely been documented. Well coordination of their movements and group actions was observed. 21–59. J. But now researchers have observed the action close up. 21, pp. “Holarctic Marine Mammals,” St. Peterburg, September 10–14, 2006), 2006, pp.

Follow Matt Walker and BBC Earth on Twitter. trudov po materialam IV mezhdunar. 151–180. As the orcas approached, the mother humpback would sometimes move her calf to her side, or lift it out of the water using her head or flippers. 3, pp. Kruchenkova, D.I. Kochnev, A.A., Kryukova, N.V., Pereverzev, A.A., and Ivanov, D.I., Coastal Haulouts of Pacific Walruses (Odobenus rosmarus divergens) in Anadyr Gulf, the Bering Sea, in 2007, in Sb. The video analysis of the “attack phase” showed that killer whales made 55 attacks on the walrus during 17.3 min. Jefferson, T.A., Stacey, P.J., and Baird, R.W., A Review of Killer Whale Interactions with Other Marine Mammals: Predation to Co-Existence, Mammal.

Learn more about Institutional subscriptions. V Int. Correspondence to View image of Adult humpbacks are formidable foes (credit: Christopher Michel / CC by 2.0), View image of A washed-up grey whale calf marked by orca teeth (credit: DocentJoyce CC by 2.0), View image of Some orcas are specialist hunters (credit: Doug Perrine / NPL), View image of Orcas hunt in pods (credit: NOAA / Vancouver Aquarium), View image of Adult humpbacks are formidable foes (credit: Simon Ager / CC by 2.0), View image of Whales may thrash their tails to defend each other (credit: Liza / CC by 2.0).
“Holarctic Marine Mammals,” Odessa, Ukraine, October 14–18, 2008), 2008, pp. 111–114. Zool., 1995, vol. Litovka, M.I., Smirnov, G.P., and Kochnev, A.A., Observations for Killer Whales, Orcinus orca, in Region near Meeskyn Spit Island (Anadyr Gulf, the Bering Sea) in 2001–2003, in Sb. 550–556. 306–321. Thesis, St. Petersburg, 2006. Despite the efforts of the mother whales and escorts, the orcas were more often than not successful in their attacks. “Holarctic Marine Mammals,” Lake Baikal, Russia, September 10–15, 2002), Moscow: SMM, 2002, 185–186. V Int. During that time, her pod attacked eight humpback whale calves. But there was no way for us to verify whether this dead walrus was associated with the event.”, EXPLORE The Complete – Walrus Live Camera Experience. (Biol.) More orca tooth marks are found on humpbacks than any other whale species. Conf.

347–351. They aggressively turn to battle the orcas, and even recruit "escort" whales to help fight off the attacks. nauch. Lopez, J.C. and Lopez, D., Killer Whales (Orcinus orca) of Patagonia, and Their Behavior of Intentional Stranding while Hunting Nearshore, J. 22, no. They followed her for six days. V Int. nauch. To investigate further, the scientists attached a tracker to a female orca, which allowed them to use satellites to monitor her movements. On 14 occasions, the orcas attacked and killed a humpback whale calf. “Holarctic Marine Mammals,” Odessa, Ukraine, October 14–18, 2008), 2008, pp. Some orcas for example, particularly those living in northern latitudes including the North Pacific and Antarctica, only hunt fish, while others exclusively hunt seals. 66, pp. Sci., 2007, vol. konf. konf. Ivashin, M.V. The first phase was an attack on the group of walruses and choice of individual prey; the second phase was attacks on the chosen walrus; and the third (final) phase was a decrease in activity of killer whales and leaving group with walrus from sea shore. Read about our approach to external linking. Biol Bull Russ Acad Sci 39, 768–778 (2012). Blue, fin and minke whales are thought to do this, sprinting at high speed so that the orcas can't keep up.

555–569.

In light of their study, the researchers believe that orcas may congregate each year off the coast of Western Australia to prey on baby humpback whales. Sci. For example, humpback whales are among the most studied large whales, being observed for countless hours at sea by scientists. Diane recounts what happened: “We were out early on a windy day doing surveys when we noticed over 40 walruses rushing to shore. Ivkovich, T.V., Population Structure of Killer Whales, Orcinus orca, in Avachinskaya Bay, M.S. 304–308. They observed orcas attempting 22 separate attacks on humpback whales. & Ivanov, D.I.

On average, each killer whale attacked the walrus seven times.

Grachev, A.I., Gorshunov, M.B., and Mymrin, R.N., Killer Whales (Orcinus orca) in Coastal Waters off the Chukchi Peninsula, Tez. Two killer whales tried to kill walruses by chasing them and jumping out of the water on the shore. konf. V Int. Conf. Orcas have developed a reputation for preying on baleen whales, a group that includes blue, fin and humpback whales among others.

They have been recorded attempting to attack almost every species, and also sperm whales, the largest species of toothed whale. II mezhdunar. konf. A week later, a dead walrus came to shore, and its body was covered in bruises.
On average, each killer whale attacked the walrus seven times. The attack tactics of killer whales, the number of movements, and the location of killer whales (adults and calves) relative to each other and to the walrus were described. The whales eventually drifted away and the walruses disappeared in the whitecaps. Google Scholar. Each with big jaws, full of teeth. 16th Biennial Conf. 31, 1981, p. 521. https://doi.org/10.1134/S106235901209004X. In 2006, Alaska Fish and Game staff Diane and Brian Okonek had a rare opportunity to witness a dramatic killer whale and walrus event in the waters just off Round Island, home of the explore.org Walrus Cam. But the presence of the escorts did reduce how many times a whale calf was killed. Research over recent decades has also revealed a range of orca populations around the world, each hunting different prey using different techniques. According to Walrus the walrus’ natural predators are Killer whales and Polar bears. III Int. Kryukova, N.V., Kruchenkova, E.P. But until now there was no scientific record of an orca killing a humpback whale. 3, pp. konf. Baleen whales themselves are popularly thought to be large but generally unassuming, passive creatures. “Holarctic Marine Mammals,” Lake Baikal, Russia, September 10–15, 2002), Moscow: SMM, 2002, pp. Sci., 2001, vol. Many don't hunt whales at all. © Copyright 2020 This is a preview of subscription content, log in to check access. © 2020 Springer Nature Switzerland AG. “Holarctic Marine Mammals,” Koktebel, the Crimea, Ukraine, October 11–17, 2004), 2004, pp. Zenkovich, B.A., About the Killer Whale, Grampus orca L., Priroda (Moscow), 1938, no. Original Russian Text © N.V. Kryukova, E.P. They managed to stay in a tight huddle throughout the event. Perhaps most surprising, humpback whales also have adult "escorts" that try to protect calves that are not their own, joining the mother in defending the smaller whale.

“Morskie mlekopitayushchie Golarktiki” (Odessa, Ukraina 14–18 oktyabrya 2008 g.) (Collected Works: Proc. 413–417. For a start it has been unclear whether orcas, also known as killer whales, really hunt whales, and how often. 91, No. Mammal., 1985, vol. The video analysis of the “attack phase” showed that killer whales made 55 attacks on the walrus during 17.3 min. Mamm. trudov po materialam V mezhdunar. Walruses don’t have many predators, but killer whales are among them. These escort whales either charged at the orcas, or placed themselves between the attackers and calf, thrashing their tails and flippers. konf. Conf. Nor did we know how the whales themselves might react to such attacks. The whales divided out a group of 3 walruses (see photo below). 6, pp. Maniscalco, J.M., Matkin, C.O., Maldini, D., Calkins, D.G., and Atkinson, S., Assessing Killer Whale Predation on Steller Sea Lions from Field Observations in Kenai Fjords, Alaska, Mar. Vladimirov, A., An Attack of Killer Whales (Orcinus orca) on a Mother-Calf Pair of Western Gray Whales in the Water of Northeastern Sakhalin Island, Russia, Abstr. 1300–1311. That suggests that, for this population of orcas at least, humpback whales are a predictable and plentiful prey, although the orcas were only seen attacking calves and not adult whales. Under the waves cruises a pod of orcas, huge, sleek predators, each around 8 metres long and weighing some 6 tonnes. The main behavioral patterns of killer whales during the hunt were discerned. The Great white shark would likely beat the walrus, particularly if it surprised it. What's more, the humpback whales themselves aren't passive victims. The results are published in the journal Marine Mammal Science. Nikulin, P.G., Far Eatern Marine Mammals: The Chukchi Walrus, Izv. “Morskie mlekopitayushchie Golarktiki” (Sankt-Peterburg, Rossiya, 10–14 sentyabrya 2006 g.) (Collected Works: Proc. trudov po materialam V mezhdunar. konf. Made possible by the Annenberg Foundation.

“Morskie mlekopitayushchie Golarktiki” (Odessa, Ukraina, 14–18 oktyabrya 2008 g.) (Collected Works: Proc. The largest male whale circled at a distance while the rest of the whales began tail-slapping the walruses from above and below, sometimes lifting the walruses up in the water. - 122.201.121.241. 21, no. The total duration of their hunt activity was not less than 95 min. Burdin, A.M., The Commander and Aleutian Islands: Stability and Degradation of Marine Mammal Populations, in Sb. “Morskie mlekopitayushchie Golarktiki” (Odessa, Ukraina, 14–18 oktyabrya 2008 g.) (Collected Works: Proc. When chased by orcas, certain species of baleen whale are known to try to outswim their pursuers. During the seven attacks in which the researchers witnessed the outcome, the orcas killed the humpback whale calf on three occasions. Such life-or-death battles, between orcas and whales, have captured the popular imagination. It is not yet clear whether escort whales are related to the calves and if not, how they might benefit from defending them. Biology Bulletin From their secret lives in the kelp to having super powers that helped it 'defeat' Megalodon, it even has the story arc of having a kryptonite. Kryukova, N.V., Pereverzev, A.A., Kochnev, A.A., and Ivanov, D.I., Marine Mammals in Coastal Waters of Northern Anadyr Gulf, the Bering Sea, in the Summer of 2007, in Sb. 109–112. But at other times, the humpback whales decided to stay and fight.

and Dill, L.M., Occurrence and Behaviour of Transient Killer Whales: Seasonal and Pod-Specific Variability, Foraging Behaviour, and Prey Handling, Can. “Morskie mlekopitayushchie Golarktiki” (Baikal, Rossiya, 10–15 sentyabrya 2002 g.) (Abstr. Dissertation, Moscow, 2008. Perhaps they were head-butting them from below but, of course, we couldn’t document this. Robert Pitman, a marine biologist based at the US National Oceanic and Atmospheric Administration, in La Jolla, California and colleagues from the US and Australia, tracked orcas and humpback whales off the coast of Western Australia. Walruses are no match for killer whales in hot pursuit. “Morskie mlekopitayushchie Golarktiki” (Sankt-Peterburg, 10–14 sentyabrya 2006 g.) (Collected Works: Proc. and Zagrebin, I.A., Killer Whale Predation in Coastal Waters of the Chukotka Peninsula, Mar. The group of killer whales consisted of seven adults (one adult male did not participate in attacks) and two calves.

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