Category Archives: Ecoguardians Log

A Diver and Dying Seagulls

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Weather:

  • Visibility 10-20 NM, great visibility especially in the few hours before sunset
  • Sky partially overcast
  • Wind 5-15 knots W
  • Calm seas for the most part, other than strong ebbs and floods

Visitors: Some pleasure craft over the past days. There have been some supply deliveries as well as a few visitors for various reasons. Today we saw what looked to be a private vessel enter the reserve and put a diver in the water. The dive lasted less than ten minutes and when the diver was back in the boat, they left quickly.

Ecological Notes: 

  • The elephant seals are all here still – the two large and two small ones from earlier in the week. The two larger seals and one of the smaller ones have hauled themselves up high onto the island, and the other smaller seal looks to be more comfortable closer to the water. Look for them on the webcam!
  • We’ve had a few more strange seagull deaths with the same symptoms: gradual weakening (reluctance to fly and a lethargic walk), separation from the rest of the seagulls, eventually progressing to being unable to fly, and finally silent coughing/choking movements followed by death.
  • Two orcas spotted on Monday, behind north rock and heading east.
  • There’s still a heavy sea lions presence, mainly on the jetty and the surrounding rocks, and around the base of the lighthouse.
  • Mid week we had around 20 eagles in the area and were able to catch a few quick pictures of them in flight!

 

Clear Skies + Elephant Seals! (census)

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Weather:

  • Visibility 15+ NM
  • Sky mostly clear, overcast in late afternoon
  • Wind 0-10 knots N
  • Sea state: calm, glassy!

Visitors: A small number of pleasure crafts trickling through. Only a handful of tourism vessels over the weekend and a few through the late week.

Ecological Notes: 

  • This week has brought some of our favorite visitors to Race Rocks: elephant seals! We’ve been joined by two huge male elephants seals as well as two younger pups that look to be only a year or so old. Unfortunately we haven’t seen any tagged elephant seals yet so that’s all we know for now.
  • We’ve still been spotted seagulls displaying odd behavior. We’ve noticed a total of 7 over the past month.
  • Whale sightings have slowed down now, seemingly as the weather gets colder and salmon runs slow. We have still been seeing around one per day but the sightings are less consistent.
  • Today we noticed a tiny sea lion pup nursing! We mostly only see male sea lions on race rocks, but recently we’ve been noticing very small sea lions arriving. It’s hard to tell the sex of sea lions from a distance so this was the first female we’ve identified in the crowd.
  • The bald eagles have continued to visit to fish and hunt gulls in the early to late morning. They particularly like to sit under the tower containing camera 5, sometimes up to 10 at once! The color variation throughout their different life stages is particularly striking.

Census:

  • 54 Harbour seals
  • 177 Stellar sea lions
  • 233 California sea lions
  • 4 Elephant seals
  • 275 Brandt’s + pelagic cormorants (too far away to distinguish)
  • 6 Double-crested cormorants
  • 5 Surfbirds
  • 3 Dunlins
  • 25 Black turnstones
  • 12 Harlequin ducks
  • 7 Bald eagles
  • 290 Thayer’s gulls

Measurement Exercise

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Today we had a request from Meghan Byrne, a 6th grade science teacher in the San Francisco Unified School District. She was doing a lesson with her students on size and scale and she was interested in using the following picture from this blog of the elephant seal measuring device – and letting students determine its length.

 

 

 

So I thought that would be a good exercise to include here for school students. Ecoguardian Mara has provided the following photos of the boat ramp rail so you can now calculate the length of the small elephant seal. 

Be sure to calculate the length of the Elephant seal in both centimeters and in inches.  Then you can also convert it to Metres and Feet . 

Mara sent another picture of a larger male, the brackets on the rail can just be made out so calculate his size.

 

A Big Storm + Lots of Birds! (census)

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Weather Today: 

  • Visibility 14 NM
  • Sky partially overcast
  • 30-55 Knots SW
  • Sea state: swells up to 2m, otherwise 3-4+ ft chop

Visitors/Traffic: Nothing other than a few fishing and shipping vessels in the strait.

Ecological Notes: 

  • We found another apparently healthy gull dead today; this is the fourth one since the beginning of the month. We now have two preserved for necropsy, which we hope to transport to land soon to be investigated. They have all displayed the same odd symptoms: weakness in the wings progressing to unable to move, wings dropping to the sides, and unable to make any sound.
  • This week there have been an incredible number of cormorants in the reserve! An underrated bird, they are very fun to watch as they waddle, preen, and fish.
  • We’ve been noticing some fungi popping up around the island now that we are into the rainy season! Photos below. These are in addition to the shaggy mane mushrooms we found last spring fruiting beside the composters.
  • Last week we spotted another “neck wrap”: a california sea lion with some kind of pollution material embedded into his neck. Unfortunately it seems that he is no longer present in the reserve, making a rescue improbable.

Census:

  • 4 black oystercatchers
  • 1 dunlin
  • 1 ruddy turnstone
  • 9 black turnstones
  • 3 surfbirds
  • 500 Thayer’s gulls
  • 17 Canada geese
  • 1550 Cormorants (wow!)
  • 2 bald eagles
  • 100 stellar sea lions
  • 502 California sea lions
  • 2 harbour seals

Seawater Data: Salinity and Temperature, November 2020

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Also available from DFO here, along with data from other sites on the West Coast.

November -2020:

DATE time Degrees-C Salinity-ppt
1 13:30 9 32.3
2 14:30 9.2 31.8
3 15:00 9.3 31.7
4 16:00 9.3 31.8
5 –
6 –
7 –
8 –
9 8:00 9.2 31.6
10 9:00 9.3 31.7
11 10:00 9.1 31.5
12 11:00 9.2 31.3
13 12:00 9 31.7
14 12:30 8.8 32
15 13:00 8.6 32.2
16 14:00 8.7 31.9
17 14:30 8.8 31.7
18 15:30 8.7 31.8
19 16:30 8.6 31.6
20 –
21 –
22 8:00
23 9:00 8.8 31.8
24 10:00 9 31.7
25 10:30 9.1 31.8
26 11:00 9 31.9
27 12:00 8.8 31.6
28 12:30 8.9 31.5
29 13:00 8.9 31.6
30 13:30 8.8 31.7

Busy Shorebirds, Sea Lion Shot?

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Weather:

  • Visibility 15+ NM
  • Sky partly cloudy, blue sky and sun!
  • Wind 0-15 Knots NW
  • Water calm

Visitors:

  • A few supply drops to the island otherwise quiet, not much traffic
  • Some navy vessels on the water today as some blasting was taking place on the DND land.

Ecological Notes:

  • Today we spotted a young seagull displaying the same symptoms as the one we found a few weeks ago: extending its neck as if to catch its breath or perhaps dislodge something stuck inside its throat. We noticed it initially because it had separated from the group and had tucked under some foliage. Within 15-20 minutes it appeared to be unable to move aside from lifting its head, and with wings splayed it died. We did inspect inside the mouth and throat that we could see and nothing appeared to be lodged inside. We are not sure what caused these deaths (or if it was the same cause), but we are interested to learn more. We are hoping that we will be able to send it for a necropsy.
  • On Saturday we were surprised by a large male elephant seal! He was so huge that he dwarfed even the largest sea lions here in the reserve. Wow! He must have had places to be and moved along the next day.
  • Our whale sightings have slowed down now, although we have been still spotting at least 1 humpback whale every day. They seem to appear around peak ebb current to feed around the reserve.
  • We have been periodically checking on our dead sea lion that appeared last week. Although not officially determined, after some input we strongly believe that the animal was shot. It appears as if it was shot and then made it onto land here before passing. While it is a heartbreaking find, we are excited to observe the decomposition process.
  • We have been observing gulls pecking at the remains of gulls killed by eagles. The cannibalism is not necessarily a surprise to us, having also observed adult gulls eating the chicks of other gulls over the nesting seasons. However, it is interesting, given how much food is readily available.

 

Deceased Sea Lion + Chilly Nights

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Weather Today: 

  • Visibility 15 NM
  • Sky partially overcast
  • Wind 5-10 knots NE
  • Water mostly calm

Visitors and traffic: 

  • Not much traffic with the strong winds this week and last (55 knots!) only a handful of whale watching boats when conditions allow

Notes: 

  • Just above the intertidal east of the jetty we found the carcass of a deceased male Stellar sea lion. It’s the early stages of decomposition and we think it died at least 4 days ago since we accidentally captured it in the background of one of our photos. We are not sure how it died and it has no obvious injuries. We are hopeful that we might be able to learn more! We’re not sure if it died here or was washed ashore by the strong swells last weekend.
  • Last week we forgot to mention that we were joined by a sweet young elephant seal who had hidden among the sea lions near the jetty. It was not tagged so unfortunately we don’t have any more information and it was gone by the next day.
  • There have been an incredible number of eagles in the reserve eating both fish and seagulls. It’s amazing to watch them hunt and even more incredible to watch them carefully pluck a bird before digging in (albeit a bit gory).
  • We have still been seeing whales every day, primarily humpbacks but we have also been thrilled to see the occasional pod of orcas passing by. Today we spotted one young whale tail slapping continuously for about 5 minutes before moving along past Pedder Bay. It’s comforting to see the whales exhibiting their regular feeding patterns now that there are fewer vessels on the water. Now that we have become more tuned observers of whales, the behavioral contrast between vessels present and absent can be very stark.

Census: 

  • 195 Stellar sea lions
  • 330 California sea lions
  • 1 Ruddy turnstones
  • 22 Black turnstones
  • 2 Sanderlings
  • 17 Harbour seals
  • 6 Bald eagles
  • About 600 Pelagic cormorants and Brandt’s cormorants
  • About 300 California gulls

A Canada Goose Curiosity

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Weather Today: 

  • Visibility 10-15 NM
  • Sky overcast
  • Wind 20-30 knots NE
  • Large swells and some whitecaps

Visitors and traffic: 

  •  There has not been many boats coming through, probably due to the poor conditions.

Notes: 

  • The weather since our last post was very rough, we had winds of over 50 knots (about 100km/h) and some very rough surface conditions.
  • We have been having some equipment issues but we are back and have some great photos to share!
  • On Saturday we spotted an oddity – a Canada Goose with a mostly white neck. It really stood out from the rest of its feathered friends and it was a rush to the camera for us. We think it may be leucistic. Leucism is not one specific condition, and this ‘depigmentation’ probably has an underlying genetic cause.
  • We have seen a variety of eagle but most exciting was the bird about 20 feet in front of the house, perched on top of a freshly caught seagull!
  • On Sunday a seagull with a badly injured and nearly missing wing was around, perhaps the result of a predator attack gone badly for both parties. It was completely alert and walking around with the other seagulls but we haven’t seen it since and presumably it succumbed to its injuries or predation.
  • Canadian Coast Guard Ship John Cabot, an offshore fisheries science vessel, paid the area a visit. The vessel hung around for about an hour and looked to be doing something with a lifeboat, maybe training? CCGS John Cabot was just recently constructed at Seaspan Shipyards and was launched in July, champagne bottle and all, by provincial health officer Dr. Bonnie Henry.
  • Visibility has been erratic – we will have a census posted when first possible.

Seagull Stones and Census

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Weather Today: 

  • Visibility 10 NM
  • Sky overcast
  • Wind 10-15 knots SW
  • Calm seas earlier in the day, rougher later on – swells 1-2m high

Visitors and traffic: 

  • Some old equipment is being moved to land, so there have been a couple of runs back and forth to the college.
  • The usual 5 or so whale watching vessels daily, very few pleasure craft as the weather gets worse.

Ecological Notes: 

  • We have been seeing whales every day, both humpbacks and orcas!
  • We thought the sea lions were beginning to move along for good but they came back – it has been interesting to observe how suddenly it can go from a couple hundred hauled out to perhaps only 50. They must leave in the night as we have yet to notice it as it happens.
  • Unfortunately we have another sea lion hanging around that has plastic around its neck.
  • While doing some work on the jetty today I (Kai) noticed an interesting pile of small stones piled up in a corner of the railing. We often see seagulls, especially the ones that look younger, playing with rocks of the same size. They are usually together in a group of 2-4 and they’ll take turns moving a rock around, holding it in their beak, and trying to take it away from each other. It seems plausible that the seagulls placed the rocks there, we haven’t seen other animals interacting with each other and objects this way.

Some photos from the last couple of days:

Census:

65 Harbour Seals

457 California Sea Lions

737 Cormorants

4 Eagles

17 Geese

4 Oyster Catchers

13 Black Turnstone

3 Humpback Whales

221 Seagulls

184 Stellar Sea Lions

Whales, Harlequin Ducks, and Eagles!

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Weather Today: 

  • Visibility 1-5 NM
  • Sky overcast, moderate fog cover
  • Wind 10-25 knots W
  • Waves up to 0.5m

Visitors and traffic: 

  • On Sunday we had a burst of whale watching activity, some around North Rock but primarily south of the reserve near the Rosedale Reef marker.
  • We have had some supplies (water, etc.) delivered over the last couple of days.

Ecological/Weather Notes: 

  • We woke up in a fog bank on Monday and the fog has stuck around, although with periods of clarity. It sounds like Vancouver Island is going to continue getting wet weather over this week.
  • As mentioned above, on Monday there were 2 minke whales (?) in the general area of North Rock and some time later 2 or 3 humpbacks south of us. A good handful of of whale watching/eco tourism vessels came by to get close to the action.
  • Over the last couple of days we’ve been seeing whales daily, usually out about a kilometre in the strait but once or twice they’ve come in closer to Rosedale Rock.
  • Mara spotted some brightly coloured Harlequin sea ducks in the water just off the shore south-east of us.
  • This afternoon two large bald eagles visited. Going off of the stray seagull leg and patch of feathers near the house, they were resting after a snack.
  • As the census shows below the sea lion numbers reflect the colder weather moving in and them moving out!
  • Yesterday on the jetty, we spotted a pile of what we think are regurgitated squid quills and eyeballs.
  • Garry Fletcher kindly gave us a tip about the ‘mystery berries’ from the last log post. He suspects them to be from a Strawberry Tree (Arbutus Unedo) and was even able to share pictures of a tree and its fruit. Thank you, Garry!

Census:

412 California Gulls

68 Glaucus Gulls

9 Stellar Sea Lions

76 California Sea Lions

65 Cormorants

14 Black Oyster Catchers

10 Harbour Seals

7 Canada Geese

15 Black Turnstones