Author Archives: Garry Fletcher

Carduus acanthoides : Plumeless thistle- The Race Rocks taxonomy

Posted on by

from https://racerocks.ca/upkeep-day/

Neha Acharya-Patel  the ecoguardian at Race Rocks identified this new species for Race  Rocks in the log today.

From Wikipedia,  the classification as follows

Scientific classificationEdit this classification
Kingdom: Plantae
Clade: Tracheophytes
Clade: Angiosperms
Clade: Eudicots
Clade: Asterids
Order: Asterales
Family: Asteraceae
Genus: Carduus
Species:
C. acanthoides
Binomial name
Carduus acanthoides

 
Other Angiosperms at Race Rocks.

taxonomyiconReturn to the Race Rocks Taxonomy
and Image File
pearsonlogo2_f2The Race Rocks taxonomy is a collaborative venture originally started with the Biology and Environmental Systems students of Lester Pearson College UWC. It now also has contributions added by Faculty, Staff, Volunteers and Observers on the remote control webcams.

 

Progne subus: Purple martin – The Race Rocks Taxonomy

Posted on by

On June 20, 2045 , Race Rocks Ecoguardian Christine Chourmouzis found a purple martin in her house

she writes in her log: Two purple martins were spotted on top of the tower and on roof of the Keepers’s house around noon.  At 3 pm I discovered a purple martin had made its way down the chimney pipe into the wood stove. I am so glad the ashes were cold and I was able to get it back outside! 

 

  • Purple martins suffered a severe population crash in the 20th century widely linked to the release and spread of European starlings in North America. European starlings and house sparrows compete with martins for nest cavities. Where purple martins once gathered in the thousands, by the 1980s they had all but disappeared. (Wikipedia)

They have excellent aerodynamic  maneuvering control as they fly quickly over open areas catching insects with a wide opening mouth. They are valued for their voracious appetite for mosquitoes and flies. With their food being flying insects, the island certainly provides an abundant supply of the kelp fly Coelopa vanduzeei

Domain: Eukarya
Kingdom: Animalia
Phylum: Chordata
Sub-phylum: Vertebrata
Class: Aves
Order: Passeriformes
Family: Hirundinidae
Genus:Progne 
Species: subis. (Linnaeus, 1758)
Common Name: Purple martin

Physical Description:

 It is the largest swallow in North America. 
With an average length of 20 cm (7.9 in) and a wingspan of up to 38 cm (15 in), the purple martin is the largest amongst the 90 odd species in the family Hirundinidae.[9]
Purple martins are sexually dimorphic. Adult males are entirely black with a glossy steel blue sheen, the only swallow in North America with such coloration. Adult females are dark on top with some steel blue sheen, and lighter underparts. Adults have a slightly forked tail.

Relationship with humans:

Continual maintenance and protection is required, as European starlings and house sparrows compete with martins as cavity-nesters, and will fight with martins over nest sites. Thus, unmonitored purple martin houses are often overtaken by more aggressive, non-native species.[3] Purple martin proponents are motivated by the concern that the purple martin would likely vanish from eastern North America were it not for this assistance.[24]( Wikipedia)

Other Members of the Class Aves at Race Rocks 
taxonomyiconReturn to the Race Rocks Taxonomy
and Image File
pearsonlogo2_f2The Race Rocks taxonomy is a collaborative venture originally started with the Biology and Environmental Systems students of Lester Pearson College UWC. It now also has contributions added by Faculty, Staff, Volunteers and Observers on the remote control webcams.

June 20 2024 Christine Chourmouzis – Ecoguardian

Race Rocks Ecological Reserve Warden’s Report June 14 2024

Posted on by

Garry Fletcher, ER Warden for Race Rocks visited the reserve on June 14, 2024

Greg Dickinson from Pearson College provided transport in Second Nature for the following group: 

  • Lisette and Mads – Mads is a  former student and both are volunteering at Pearson College
  • Garry Fletcher – Park Warden
  • James Tuohy – future Ecoguardian
  • Ann Nightingale and Andrew Jacobs – Rocky Point Bird Observatory

Upon docking I was struck by the number of Pigeon Guillemots on the rocks . Although I haven’t checked back in our records, there certainly seems to have been an increase in numbers 

We were greeted by the new ecoguardian  Christine  Chourmouzis .  In addition to having a general survey of the reserve, I was able to direct Christine and James through the process of entering them as editors on racerocks.ca and creating a log and posting it on the Race Rocks website. 

Supplies for the Ecoguardian are off-loaded

 

 

 

 

 

 

Pigeon Guillemots also nest on the island

 

When I was teaching at Pearson College, we often monitored a set of tidepools out on the island’s West side. I checked out those pools again and took photos which show the state of algae growth. Some observations in the tidepool files provide a baseline for comparative studies in the future.  These files are on the tidepools

Today’s observations are in the set of photos below

I checked pool #4 which has a white quartz intrusion through it to see if the white periwinkle snails were still there. 

 

A review of some of the installations on the Island

 

Due to recent notices on social media about the problems that pet owners are having when their dogs get exposed to foxtail , I was concerned about whether there was a similar problem with marine mammals. This guy certainly seems to be enjoying the location however. 

I tried to find the small patch of the rare plant  seaside  plant Romanzoffia on the rocks on the East side of the house.  Unfortunately the area was covered with knotweed now. We will have to check again in the winter. 

The Turkish marsh gladiolus is now in bloom. This is a good example of a garden escape, planted by lighthouse keepers probably as much as 80 years ago, they still come up every summer .

 

 

E-Bird June Race Rocks gull survey and Census

Posted on by

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

Polygonum aviculare : prostrate knotweed- The Race Rocks taxonomy

Posted on by

This summer there is a proliferation of knotweed in areas on Race Rocks in which it has not occurred before :  also see: https://racerocks.ca/polygonum-aviculare-prostrate-knotweed-the-race-rocks-taxonomy/

The following Classification is from Wikipedia

https://en.wikipedia.org/wiki/Polygonum_aviculare

Scientific classificationEdit this classification
Kingdom: Plantae
Clade: Tracheophytes
Clade: Angiosperms
Clade: Eudicots
Order: Caryophyllales
Family: Polygonaceae
Genus: Polygonum
Species:
P. aviculare
Binomial name
Polygonum aviculare

L. 1753
commonname : Common knotgrass or Prostrate knotweed

Ecoguardian Change-over day

Posted on by

FRIDAY 19 April CHANGE-OVER DAY
Sunny with brisk breeze. 7C NE 18/gusts33
6.30 AM Observed 9 Steller, 3 Cal plus two young (or females?) on Welcome Rock (near jetty).
Five Elephant seals. Gulls still at rest. Very odd to see no guillemots in sun from north window.
Early detonation on DND.
Housekeeping: The usual bath/floors/fridge. Wiped window casings and sills of new windows;
swept baseboards; cleaned light switches and cabinet pulls.

Flowers bloooming

Posted on by

Eco-guardians Allen and\ ilka Olsen

THURSDAY 18 April
Clear and sunny with brisk breeze. Numerous VHF warnings of CA warship conducting
ammunition firings. DND detonating explosives. Continued to view wildlife and vegetation.
Calendula beginning to bloom; flowering beach pea (Lathyrus japonica) on stump battered by
gale. Magnificent display of brodiaea along west house foundation. Found that the invasive
sedum is supported on sealion felt; beginning to invade grass.
Good recovery of grasses and other greens.
Chopped wood/filled stove box and cleaned area; filled batteries; finished with solar panel
wash.
Not a single wildlife tour boat.

Animal Census April 17, 2024

Posted on by

WEDNESDAY 17 April CENSUS DAY
Calm & sunny. Wind N6/18 gusts mid-morning.
Began count on tower at 6.30 to count especially gulls while still mostly at rest.
Vessel Traffic: At any time, 5-8 freighters including what looks to be super tankers. CA naval
patrol vessel. 8-10 fishers out at all time of day. May be after prawns as some floats visible. Not
a single tour vessel!
DND detonated explosives 4 times; one blast shook windows.
Facility Work: Cleaned solar panels; attached hose from student bldg.
Began sawing/splitting wood but again interrupted by E seals near by.
Cleaned/rearranged kitchen drawers; cleaned top of fridge
Cleaned out freezer
Census Count
Mammals: Sealion 43
Steller 12
California 31
Seal 77
Elephant seal 5
Birds: Gull 1531
Guillemot 150
Oystercatcher 8 (4 pair)
Bald eagle 2 (1 adult; 1 immature; 7 immature on 18 th )
Harlequin 27
Cormorant 100
Scoter white wing 7
Dunlin 4
Turnstone 6
Surfbird 5 (10 seen on 15 th )
Savanah sparrow 1
Golden-crowed kinglet 1 (seen 13-14th)
Junco 1 (seen on 15th)
Crow 1
Canada goose 8 (4 pair)