Tag Archives: census

E-Bird June Race Rocks gull survey and Census

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E-Bird Gull Survey https://ebird.org/checklist/S184107190

Subject: June Racerocks Gull Survey

Rocky Point Bird Observatory & Pearson College Race rocks Gull Survey June 2024
Survey conducted by Andrew Jacobs and Ann Nightingale
Thank you to Greg for getting us out there again on the boat and Christine with the assistance during the survey.
This survey was conducted to investigate the phenotypes of the glaucescens-occidentalis hybrid complex using the Great Race Rock as a nesting area. We looked for pairing preference of phenotypes, nest habitat preference and mapped the nests that had parents on them. We looked at the breakdown of the colony diversity into five phenotypic groups – pure type Glaucous-winged Gulls, Glaucous-winged trending hybrids or light morph Olympic Gulls, intermediate trending hybrids or intermediate morph Olympic Gulls, Western trending hybrids or dark morph Olympic Gulls, and pure type Western Gulls. The nesting of Western Gull on the island is of specific interest as there are adult Western Gulls near the island year round and we would like to see if Western Gull pairs are starting to breed in Canada or if they are forming mixed pairs.
The survey also counted other species of gull and age classes as well as other species using the rocks this time of year. The general nesting grounds on the main rock were used by the hybrid complex, Pigeon Guillemot, and Black Oystercatcher although no nests of the latter two were seen they were displaying as if nests were nearby.
Ebird link with photos and sound recordings.
The numbers of pure type Glaucous-winged Gull were up for the breeding season over our previous survey by about 6-7 times at 69 individuals with 64 adults and 5 immatures. The number of hybrid and intergrade type Olympic Gulls was 321 with 314 adults and 7 immatures. The breakdown of colour morphotypes in the Olympic Gulls was light morph (Glaucous-winged trending hybrids) 138 individuals with 133 adults and 5 immatures, intermediate morph (Intermediate trending hybrids) 166 individuals with 164 adults and 2 immatures, dark morph (Western trending hybrids) 17 individuals with 17 adults.
The island at this time contained 4 adult Western Gulls, two of which were on nests, one was in the grassy area on a rocky outcropping and one was on the outer rocky part of the island along the cliff. The two nesting Western Gulls did not have a partner present while we were on the island. Surprisingly one of the Western Gull nests appeared to have a rock placed in with its three eggs in the nest of roughly egg size.
Total glaucescens-occidentalis hybrid complex birds 394
Glaucous-winged Gull 69 (17.51%)
Olympic Gull 321 (81.47%)
-Light morph 138 (35.02%)
-Intermediate morph 166 (42.13%)
-Dark morph 17 (4.13%)
Western Gull 4 (1.01%)
Visible pairings 44
Glaucous-winged + Glaucous-winged 2 (4.54%)
Glaucous-winged + Light Olympic 6 (13.63%)
Glaucous-winged + Intermediate Olympic 3 (6.81%)
Light Olympic + Light Olympic 14 (31.81%)
Light Olympic + Intermediate Olympic 5 (11.36%)
Light Olympic + Dark Olympic 1 (2.27%)
Intermediate Olympic + Intermediate Olympic 11 (25.00%)
Intermediate Olympic + Dark Olympic 2 (4.54%)
Banded individuals included three Olympic Gulls one colour banded adult (cobalt blue over metal right leg and red over cobalt blue left leg), and one adult and one immature with metal bands.
Other Gull species in the survey area included California Gull with 3 immature individuals and Heermann’s Gull with 4 adults.
The other non larid species present
1 Canada Goose
3 Harlequin Duck
11 Black Oystercatcher
2 Killdeer
8 Rhinoceros Auklet
254 Pigeon Guillemot
3 Brandt’s Cormorant
23 Pelagic Cormorant
1 Bald Eagle
2 Barn Swallow
Pinniped abundance and usage of the area
2 Northern Elephant Seal – two immatures one small and one medium sized.
59 Harbour Seals
2 California Sealions
Map of nest locations.
Next time we will also log unidentified nests.
Any other questions or feedback is welcome.
Thank you,
Andrew Jacobs

Animal Census

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Birds

  • Harlequin duck                 8
  • Bald eagle adult                4
  • Bald eagle juvenile           6
  • Turnstones                        17
  • Dunlin                                 27
  • Gulls                                  132
  • Cormorants                       87
  • Oyster catcher                  23
  • Canadian goose                18
  • Raven                                  2
  • Crow                                     6
  • other shore bird                 7

 

Mammals

  • Steller sea lion              134
  • Harbour seal                     8
  • California sea lion           87
  • River otter                          1
  • Sea otter                             1 (reported to me by tourism vessel)

** Not on count day …. but there were transient orca in the reserve 3 days in a row last week

Aug 2 – Census surprises

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One of the reasons for doing a weekly census is to put down in writing the numbers of mammals and birds that are actually in the reserve. This gives us the opportunity to compare the results, not simply rely on memory. And that’s a good thing!  My impression on my return to Race Rocks is that there were a lot fewer gulls here than last year.  A check of a census at a similar date in 2022 shows that not to be true. The numbers are actually very similar, but down about 15% from the same period in 2021. Census records the high counts of each species observed during the day. The marine mammals, for instance are best counted at low tide when most are hauled out. The adult gulls are at their highest numbers first thing in the morning and shorebirds gather on the east beach in late afternoon. Gull chicks can be counted anytime, but are usually undercounted because of their great hiding skills. In between, the census person watches for any other birds and animals that might show themselves.

Gull chick hidden in the marigolds.

Today’s census had several surprises apart from the number of gulls. While on the jetty, I thought I caught the flash of a bird in the corner of my eye.  It was more than one. At least 3 swallows were feeding on insects in the small bay beside the jetty. I managed to get some bad photos, but good enough to identify two different Barn Swallows and one Violet-green Swallow. Later in the day, a Lesser Yellowlegs was resting with the other shorebirds, and a Parasitic Jaeger (also identified by bad photos) headed west not far off Great Race. An adult and juvenile Glaucous-winged Gull were out for a little swim.  It always amazes me to see these youngsters in the water!

Lesser Yellowlegs, possibly the first documented for Race Rocks.  First on eBird for the Race Rocks hotspot.

Out for a swim

Among the sea lions today, I found one entangled with a fishing lure. This poor animal has been her for several weeks. Another had been branded for a research study. I’ll report this number to get its history.

tagged 746R

Sea lion entangled with sports fishing tackle.

More photos below!

Census, 2 August 2023

Birds

  • Harlequin Duck                              1
  • Black Oystercatcher                       23
  • Ruddy Turnstone                            1
  • Black Turnstone                              93
  • Surfbird                                           24
  • Western Sandpiper                         2
  • Short-billed Dowitcher                     2
  • Lesser Yellowlegs                           1
  • Parasitic Jaeger                              1
  • Pigeon Guillemot                            83
  • Heermann’s Gull                             2
  • Western Gull                                   1
  • California Gull                                 120
  • Glaucous winged Gulls                 332 adults, 237 juvenile
  • “Olympic” Gull                                3 adults 3 juvenile
  • Brandt’s Cormorant                        7
  • Pelagic Cormorant                         2
  • Violet-green Swallow                     1
  • Barn Swallow                                 2
  • Brown-headed Cowbird                 2

Mammals

  • Harbour seal                                195
  • Northern (Steller’s) sea lion         79
  • California sea lion                        7
  • Sea otter                                      1

Visitors:

  • No visitors
  • Ecotourism traffic has been slow.  Several boats a day, but rarely more than one in the area at a time

Facility Work: 

  • Cleaned windows and solar panels
  • Replaced batteries in smoke, CO alarm in Student House

More photos:

** All wildlife photos taken at safe distances with high-powered zoom, and may be cropped to improve detail! **

Foggy day for an Animal Census

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The first foggy day in a couple weeks today!

With 6 new solar panels installed along with replacements to wiring that had corroded with the salty air this week, it seems the fog is barely affected our power supply which is amazing!

A couple DND blasts at Noon through the fog made even fewer animals around the reserve today.

 

Birds

  • Harlequin duck                                  5
  • Bald eagle adult                                2 
  • Glaucous winged Gulls                  527   
  • Cormorants                                      31
  • Pigeon Guillemots                             176
  • Oyster catcher                                    10
    • Oyster catcher eggs                   7   (3 in two nests and 1 in a third)
  • Savannah Sparrow                              1
  • Canada Goose                                     14
  • Barn Swallow                                       1
  • Crow                                                     3

Mammals

  • Steller sea lion                             10
  • Harbour seal                                 63
  • California sea lion                        17
  • Elephant seal sub adult male      2
  • Elephant seal adult female          2
  • Elephant seal pups                      3

 

Visitors:

  • Race Rocks Challenge participants
  • 3 contractors installing and maintaining solar panels
  • 44 Marine Science students visited to write their exam
  • 4 Pearson College Second year students came for a visit before the school year ends.

Facility Work: 

  • Fixed Compost
  • Taped off Oyster Catcher nests and made map 
  • Cleaned house
  • Filled water in batteries
  • Emptied and cleaned composting toilet
  • Cleaned windows and solar panels
  • Mopped basement
  • Organized and cleaned tool drawers
  • Fixed and rebuilt sections of Electric fence
  • Cleaned lighthouse

 

** All wildlife photos taken at the furthest distance possible, and may be cropped to improve detail! **

 

Weather – Current:

http://www.victoriaweather.ca/current.php?id=72

 

Weather – Past:

http://www.victoriaweather.ca/station.php?

Animal Census with a couple quick Terns

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Birds

  • Harlequin duck                                  5
  • Bald eagle adult                                2 
  • Bald eagle juvenile                           1
  • Ruddy Turnstone                              1
  • Glaucous winged Gulls                     685 
  • Cormorants                                        72
  • Pigeon Guillemots                             327
  • Oyster catcher                                    10
  • Savannah Sparrow                              6
  • Canada Goose                                     14
  • Raven                                                   2
  • Caspian Tern                                       2
  • Barn Swallow                                       2

Mammals

  • Steller sea lion                             16
  • Harbour seal                                 79
  • California sea lion                        32
  • Elephant seal sub adult male      2
  • Elephant seal adult female          3
  • Elephant seal pups                      3

Visitors:

  • Mollie – future Ecoguardian 

Facility Work: 

  • Chopped and stacked remaining fire wood
  • Deep Cleaning of Kitchen and sorting through house hold items
  • 3 coats Stained Kitchen table
  • Sharpened Axe
  • Mounted 2 large Elephant Seal winter coat sheds for future visitors and students to touch and see. 
  • Set up Hose system from Science house up to solar panels so we no longer have to haul a 5 gallon bucket up a ladder
  • Cleaned solar panels
  • Addled Canada Goose Eggs and mapped out nests
  • Cleaned windows

 

** All wildlife photos taken at the furthest distance possible, and may be cropped to improve detail! **

 

Weather – Current:

http://www.victoriaweather.ca/current.php?id=72

 

Weather – Past:

http://www.victoriaweather.ca/station.php?

Peregrine Falcon During Animal Census

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It was a very quick moment but a peregrine falcon flew by, low along the rocks of the east shore and swooped across the north by the crane and jetty. I lost sight of it quick and was unable to snap a photo, but I was a beautiful moment to witness.

Adult Bald Eagles were catching fish today and fighting over them in the sky.

Juvenile Bald Eagle sitting on the old crane.

Adult Bald Eagle perched atop our northern camera.

Adult Bald Eagle with a fresh catch.

 

Birds

  • Harlequin duck                                  4
  • Bald eagle adult                                2 
  • Bald eagle juvenile                           2
  • Turnstones                                        1
  • Glaucous winged Gulls                  527     
  • Cormorants                                        36
  • Pigeon Guillemots                             167
  • Oyster catcher                                    8
  • Fox Sparrow                                         8
  • Canada Goose                                     16
  • Raven                                                   1
  • Peregrine Falcon                                     1

 

Mammals

  • Steller sea lion                             35
  • Harbour seal                                 73
  • California sea lion                        38
  • Elephant seal sub adult male      2
  • Elephant seal adult female          2
  • Elephant seal pups                      2

 

Coast Guard Zodiac going through Middle channel.

Visitors:

  • Sarah, a women who is also a marine biologist, battling cancer who will loose her sight came out to see the elephant seals before she does. 

Facility Work: 

  • Chopped drift wood
  • Cleaning and organizing house and tools 

 

** All wildlife photos taken at the furthest distance possible, and may be cropped to improve detail! **

 

Weather – Current:

http://www.victoriaweather.ca/current.php?id=72

 

Weather – Past:

http://www.victoriaweather.ca/station.php?

Animal Census

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Birds

  • Harlequin duck                                  4
  • Bald eagle adult                                2
  • Bald eagle juvenile                           1
  • Turnstones                                        6
  • Killdeer                                               2
  • Glaucous winged Gulls                  597     
  • Cormorants                                        74
  • Pigeon Guillemots                             195
  • Oyster catcher                                    11
  • Canadian goose                                 11
  • Surf Birds                                             3
  • Savannah Sparrow                             1
  • Fox Sparrow                                         11
  • Canada Goose                                     11

 

Mammals

  • Steller sea lion                             6        – Seem to have disappeared today
  • Harbour seal                                 68
  • California sea lion                        47
  • Elephant seal sub adult male      2
  • Elephant seal adult female          3
  • Elephant seal pups(2F 1M)          3

Visitors:

  • 14 Pearson College student  and Laura visit the western tide pools

Facility Work:

  • Fire wood chopping 
  • Cleaning and organizing house and tools 

** All wildlife photos taken at the furthest distance possible, and may be cropped to improve detail! **

 Weather – Current:

http://www.victoriaweather.ca/current.php?id=72

Weather – Past:

http://www.victoriaweather.ca/station.php?

Special Guest Animal Census

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Thank you to Andrew Jacobs and his associate for this onsite survey conducted on March 8 …..

It shows the difficulty in Gull ID’s, and why I normally report ### – “Gulls”

 

Total – Species – Stationary (on water or rocks staying in area) Flying (Flying around or past the area)

8 Canada Goose : 8 stationary

25 Harlequin Duck : 25 stationary

17 Black Oystercatcher : 17 stationary

64 Black Turnstone : 9 flying 53 stationary

17 Surfbird : 17 stationary

8 Dunlin : 4 Stationary 4 flying

14 Rock Sandpiper : 14 stationary

7 Common Murre : 7 flying

35 Pigeon Guillemot : 9 stationary 24 flying

1 Marbled Murrelet : 1 stationary

19 Short-billed Gull : 5 immature flying 14 adult flying

4 Western Gull : 2 adult stationary 2 immature stationary

2 California Gull : 1 adult stationary 1 adult flying

2 Herring Gull (American) : 1 immature flying 1 immature stationary

9 Iceland Gull (Thayer’s) : 4 adults stationary 1 adult flying 4 immature stationary

18 Glaucous-winged Gull : 3 adults stationary 3 adults flying 8 immature stationary 4 immature flying

78 Western x Glaucous-winged Gull : 10 adult flying 57 adult stationary 6 immature stationary 5 immature flying

1 Herring x Glaucous-winged Gull : 1 immature stationary

1 Red-throated Loon : 1 flying

121 Brandt’s Cormorant : 20 flying 101 stationary

53 Pelagic Cormorant : 6 flying 47 stationary

9 Double-crested Cormorant : 8 stationary 1 flying

13 Bald Eagle : 1 adult stationary 5 immature stationary 7 immature flying

2 Common Raven : 2 stationary

Harbour seal 23

California sealion 18

Steller’s sealion 19

Elephant Seal Pups 3

Sea Otter 1 (reported by Eco-Tourism Vessel)

August 10 and 11

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Ecological Notes:

  • First sighting of Ollie the sea otter since I arrived. His new favourite location is in the kelp east of Great Race. I had seen him there on a boat trip on Aug 1.
  • First on-land passerines of my stay seen on Thursday, Aug 11: two juvenile Brown-headed Cowbirds. It is possible the bird I saw in the fog last week could have been one of these.
  • Sea lion numbers continue to climb.
  • Whale action must be in the Gulf Islands/San Juans, as fewer whale watching boats are coming this way.
  • Most of the young gulls are busy testing their wings, especially when the wind comes up.
  • Very low tides have revealed the eel grass beds and normally hidden intertidal zone.
  • See photos below for more ecological sightings.

Weekly Census observed on Wednesday, August 10:

Mammals

  • Elephant seals: 3 (1 adult male, two juvenile females)
  • Steller sea lions: 124
  • California sea lions: 40
  • Harbour seals: 186
  • Sea otter 1

Birds

  • Canada geese: 4
  • Harlequin ducks: 8
  • Black oystercatchers: 9 (8 adults 1 chick )
  • Killdeer 2 (only on island between dusk and dawn)
  • Black Turnstones: 194
  • Surfbirds: 17
  • Common Murres: 79
  • Pigeon Guillemots:183
  • Rhinoceros Auklets: 2
  • Heermann’s Gulls: 2
  • California Gulls: 353
  • Glaucous-winged Gulls: 341 adults 169 chicks (probably undercounted as wind caused a lot of chicks to seek cover)
  • Caspian Terns: 2
  • Pelagic Cormorants: 5
  • Brandt’s Cormorants: 12
  • Brown Pelican: 1

Weather:

  • Yesterday (Wednesday, August 10):
    • Sky: Overcast, with a few sunny periods
    • Wind: W 11-31 kts
    • Sea: up to 3′ chop
    • Temperature Low 12 oC, High 19 oC
  • Today (Thursday, August 11):
    • Sky: Overcast until mid morning, then partly cloudy
    • Wind: W 4-21 kts
    • Sea: calm to rippled
    • Temperature Low 14 oC, High 18 oC

Facility Work:

  • Solar panels cleaned daily. Some windows washed.  Postponed on Wednesday due to brief electrical storm. North side of researcher building skipped on Thursday due to presence of large elephant seal.
  • Compost renewal project continues.

Vessel Traffic:

  • Many Canadian ecotour boats have been nearby and heading through the waters of the ecological reserve. Cruise ship traffic is increasing

Here are photo highlights from the past two days. Click on the photos for larger views and captions.

Eel grass

Race Rocks mussel beds appear unaffected by last year’s heat dome

Eel grass and mussel beds

Leatherback chitons

Bull Kelp

Many varieties of seaweeds exposed by the low tides

Feather duster tube worms in the intertidal zone

Alumni tours from Pearson College continued.

Cooperative Brown Pelican for census

Brown Pelican south of Great Race

Lots of food available Aug 10

Bait balls nearby were a boon for gull chicks

Young California Gull

Heermann’s Gull

Harlequin Ducks (females)

Young elephant seals on the ramp

Young elephant seal

Caspian Tern

Juvenile Brown-headed Cowbirds

Brown Pelicans west of Great Race Aug 11

Brown Pelican

Brown Pelicans west of Great Race

Smoke is coming. Moonrise on Aug 11

California sea lions

Black Oystercatcher

Ollie the sea otter sighting

Pigeon Guillemots

California sea lion

July 19 and 20 – Weekly Census

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Ecological Notes:

  • An elephant seal swam up to the boat ramp at some point yesterday late afternoon or evening. When I went to do the seawater sample at 19:30, I spotted her sleeping at the water’s edge. As far as I can tell, she has been there ever since.
  • See the photo gallery below for more ecological happenings from the past two days.

Weekly Census recorded on Wednesday, July 20:

It was not an ideal day to record the census, as it was quite foggy. Although, I had a window of less fog at around noon, when I could see all the islets that comprise Race Rocks and the water in between, so I was able to count the species from the lantern room of the lighthouse. I counted other species throughout the day as I walked around.

  • Elephant Seal: 1
  • Steller/Northern sea lions: 15
  • Harbour seals: 125
  • Bald eagles: 2 (1 juvenile and 1 adult)
  • Canada geese: 9 (5 adults, 4 goslings)
  • Black oystercatchers: 11 (8 adults, 3 chicks)
  • Cormorants: 5
  • Glaucous-winged gulls nesting on the main island: 229
  • Glaucous-winged gull chicks: approximately 250 (It is hard to get an exact number due to their camouflage in the grass and hiding under their parents) 
  • Gulls not nesting (some glaucous-winged and some other species) on the south end of the main island and outer islands: 96
  • Pigeon guillemots: 163
  • Black turnstones: 2
  • Western sandpiper: 3
  • Fox sparrow: 1

Weather:

  • Yesterday (July 19):
    • Sky: Partly cloudy, fog in evening
    • Wind: W 3-29 kts
    • Sea: rippled, then up to 1′ chop in afternoon and evening
    • Temperature Low 11oC, High 15oC
  • Today (July 20):
    • Sky: Fog overnight, a mixture of partly cloudy and fog throughout the day and into the evening
    • Wind: W 12-30 kts
    • Sea: rippled, then up 2′ chop in afternoon and evening
    • Temperature Low 11oC, High 14oC

Visitors:

  • 2 visitors from Pearson College to deliver supplies. 

Facility Work:

  • Scrubbed and squeegeed solar panels, routine tidying and checking infrastructure around the island.

Vessel Traffic:

  • Many Canadian and American ecotour boats have been nearby and heading through the waters of the ecological reserve.

Here are photo highlights from the past two days. Click on the photos for larger views and captions.