Site Complet

Boundary Bay - Roberts Bank - Sturgeon Bank (Fraser River Estuary) (BC017)

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Boundary Bay - Roberts Bank - Sturgeon Bank (Fraser River Estuary) (BC017)

Delta, Richmond, Surrey, White Rock, Colombie-Britannique

Latitude 49,100°N
Longitude 122,968°O
Altitude 0 - 5m
Superficie 753,96km²

Description du site

The Boundary Bay - Roberts Bank - Sturgeon Bank site (Fraser River Estuary) is a large complex of interconnected marine, estuarine, freshwater and agricultural habitats in southwestern British Columbia near the city of Vancouver. It includes Boundary Bay, a predominantly marine ecosystem, the estuarine waters of Sturgeon Bank, between the north and south arms of the Fraser River, and Roberts Bank, south of the south arm of the Fraser River. Maritime habitats in the IBA include sand and mud flats, eelgrass, salt marshes, estuarine marshes with sedge, cattails and bulrush and deeper tidal waters. Agricultural habitats within the IBA include the fertile, deltaic farmlands of Richmond, Delta, and south Surrey, which provide important habitat for waterfowl, shorebirds and birds of prey. Patches of forest, including mature coastal Douglas fir, provide important nesting and roosting habitat for Great Blue Herons and raptors, including Bald Eagles. The network of rivers (Fraser, Serpentine, Nicomekl and Little Campbell) and associated wetlands within the site provided historical as well as current and potential future habitat for waterbirds. Burns Bog, lying in the heart of the delta, is a sphagnum moss wetland surrounded by shore pine and alder forest.

Oiseaux

Boundary Bay, Roberts Bank and Sturgeon Bank form one of the richest and most important ecosystems for migrant and wintering waterbirds in Canada. This IBA supports globally or continentally significant populations of fifteen species, including American Wigeon, Northern Pintail, Mallard, Brant, Snow Goose, Trumpeter Swan, Western Sandpiper, Black-bellied Plover, Dunlin, Great Blue Heron, Western Grebe, Red-necked Grebe, Glaucous-winged Gull, Thayer's Gull, and Mew Gull. In addition, the IBA supports nationally significant numbers of Barn Owl and Peregrine Falcon.

In total, fifty species of shorebirds have been recorded in the area. The most numerous species found here is the Western Sandpiper - one-day, peak count estimates of at least 500,000 have historically (pre-2001) occurred during spring migration, though more recent estimates range from 120,000-180,000, which is a substantial proportion of the global Western Sandpiper population. Western Sandpiper also pass through on fall migration. Dunlin also occur in large numbers - one-day, peak counts in the spring exceeded 100,000 in 2004 and typically range from 26,000-85,000 birds. Large numbers of Dunlin can occur during fall migration and also overwinter in the delta. Black-bellied Plovers occur during winter and on migration, with one day counts of up to 6,000 birds. Dunlin and Black-bellied Plovers use both agricultural and estuarine habitats.

A significant proportion of the Wrangel Island Snow Goose population uses the banks; up to 38,400 regularly winter here; high numbers also occur on passage in fall and spring. The numbers of Snow Geese using the banks change significantly even within one winter because the birds move back and forth to the nearby Skagit River Delta in Washington State. Counts of 60,000 for the entire Fraser-Skagit Delta population are not uncommon between late October and March; about 100,000 birds were counted in 2007. During the fall and early winter, one-day counts of greater than 100,000 dabbling and diving ducks are made regularly in the IBA for species such as American Wigeon (up to 51,000), Northern Pintail (up to 44,000), Mallard (up to 27,000) and Green-winged Teal. Surf Scoters occur in large numbers in marine waters during the winter and in spring (typically 1,000-8,000 individuals); with populations exceeding global IBA thresholds twice since 2001. Many dabbling ducks use the agricultural lands and estuarine habitats.

Significant numbers of Trumpeter Swans winter in the IBA (up to 1,455 in 2010). Brant winter in marine waters of the IBA (4,080 in 2010) and pass through on spring migration. Most are Black Brant (Branta bernicla nigricans). In recent years, about 200 Western High Arctic, or Grey-bellied Geese have been present in winter. During the late summer and early fall, the area is also very important for moulting grebes. Historically, between 2,000 and 3,000 Western Grebes were regularly present in Boundary Bay, and a separate study reported over 2,000 on the estuarine banks (Stout and Cooke 2003, Butler and Cannings 1989). In recent years, Western Grebes have declined steeply; counts since 2003 have ranged from 200-1000 individuals and no longer exceed IBA thresholds. This significant decline has been noted throughout the Salish Sea (in British Columbia and Washington); the reasons for the decline are not clear and are under investigation (Wilson et al. 2013). Red-necked Grebes are also present in the IBA during spring and fall migration and winter; counts have exceeded IBA thresholds in four years since 2001, with a peak count of 2,716 in 2002.

Glaucous-winged Gulls are present year-round and occur in significant numbers during the winter, with a peak count exceeding 55,000 in 2006. Large numbers feed at the Vancouver Landfill in Burns Bog and roost on surrounding fields and on marine waters of Boundary Bay, Roberts and Sturgeon Banks. Significant numbers of Mew Gulls are also present in the fall (counts up to 1,217 in 2007) and winter (up to 3,770 in 2005). Thayer's Gull occurs in significant numbers in the winter as well, with up to 623 counted in 2001.

The IBA supports important numbers of three species determined to be Threatened or Special Concern by the Committee on the Status of Endangered Wildlife in Canada (COSEWIC; wildlife species that have been assessed as at risk by COSEWIC may qualify for legal protection and recovery under Canada's Species at Risk Act). Great Blue Heron (A.h. fannini subspecies) (Special Concern, COSEWIC) has several colonies in the IBA, including a very large one on a forested bluff adjacent to Roberts Bank and the Tsawwassen ferry jetty, with about 250-450 nests (Welstead, pers comm.). These herons are resident, and feed in intertidal areas during the breeding season, as well as on farmland, especially in winter. Barn Owl (Threatened, COSEWIC) nest in and around farmlands within the IBA; up to 106 nest sites were active over six years from 2006-2012 (Hindmarch, pers comm.). Peregrine Falcon (Special Concern, COSEWIC) regularly occurs during the winter. The number of Bald Eagles using the IBA in the winter has also increased in recent years and may exceed IBA thresholds in the future.

Enjeux de conservation

The major, immediate threat to the ecological integrity of this IBA is permanent loss, degradation (loss in quality) and fragmentation of habitats. The IBA overlaps Canada's third largest urban centre, Metro Vancouver, supporting a population projected to grow by 1.4 million by 2040, and the largest port on North America's west coast, Port Metro Vancouver, on which the region's economy is founded. Agricultural, estuarine and marine habitats have been, and continue to be lost and fragmented by current and proposed urban developments (e.g. the Southlands adjacent to Boundary Bay and Tsawwassen First Nation lands adjacent to Roberts Bank), industrial developments (e.g. major expansion of Port Metro Vancouver on Roberts Bank and adjacent upland), and related transportation and infrastructure developments (e.g. jetties, causeways, highways, bridges, rail yards, airports). Conversion of open agricultural fields to berry crops, greenhouses and other intensive uses has reduced farmland habitat available to waterfowl, shorebirds and owls (e.g. Barn Owl).

Terrestrial and aquatic habitat quality is reduced by runoff from urban, industrial and agricultural activities (Swains and Holms 1988) and dumping of contaminated water, although long-term and cumulative effects are poorly understood. Concerns about contamination from ballast water are lessened as long as de-ballasting takes place mid ocean as required. The risk of marine spills, including oil, will increase with proposed increases in shipping traffic to meet trade demands.

Changes in the marine food chain appear to be impacting some bird species. Forage fish, such as herring and sand lance, have declined in the Salish Sea in recent years, and a corresponding decrease in diving birds that predate on forage fish has been observed (Crewe et al. 2012, Anderson et al. 2009, Therriault et al. 2009).

A variety of introduced species present potential local and ecosystem level concerns. Exotic mollusks are common in intertidal areas, including Batillaria snail, Venerupis philippinarum (manila clam), and Nuttalia obscurata (purple varnish clam). Zostera japonica (exotic eelgrass) is present on Roberts Bank and in Boundary Bay. Spartina anglica (exotic cordgrass) is proving extremely difficult to control and has the potential to change intertidal mudflat to unproductive grassland (Knight 2012).

Direct mortality through fisheries by-catch (Hamel et al. 2009, BC Coast BirdWatch 2011), collisions or overhead transmission wires (Burger and Cassidy 1995), and illegal hunting (Environment Canada 2011) may have cumulative impacts on trigger species populations. Mitigation measures implemented on transmission wires have had some success, but have not eliminated collisions entirely (Cassidy et al 1998).

Widespread recreational disturbance, including hunting, dogs off leash, kite-boarding in shallow intertidal waters, and power boating in sensitive marine near shore habitats, causes migratory birds to re-distribute. The long term impacts of these disturbances are not known and need to be quantified.

Potential impacts of cumulative air and light pollution have not been studied.

Conservation management areas provide a degree of protection across approximately 45% of the IBA, mostly in the inter- and sub-tidal habitats. Alaksen National Wildlife Area (including Reifel Migratory Bird Sanctuary) and provincial Wildlife Management Areas (WMAs), including South Arm Marshes, Boundary Bay, Sturgeon Bank, Serpentine, and Roberts Bank WMAs, cover almost 40% of the IBA. The management plans for all WMAs except the Serpentine WMA need to be updated. Several regional and local parks include important mudflats and marsh habitats along the shore (e.g. Boundary Bay Regional Park and dyke trail, Mud Bay Park, Blackie Spit). Ducks Unlimited and The Nature Trust of BC own and manage important agricultural and intertidal land parcels, and 2,400 ha of Burns Bog have been designated as an Ecological Conservancy Area.

Much of the farmland within the IBA falls within the BC Agricultural Land Reserve, established to preserve agricultural land and encourage the establishment and maintenance of farms as a secure source of food. The Delta Farmland and Wildlife Trust coordinates stewardship programs that benefit farming and wildlife on over 1,400 ha of active farmland within the IBA.

The importance of the Fraser River Estuary is recognized through several other international designations. The Fraser River Estuary IBA was designated a Hemispheric Site under the Western Hemisphere Shorebird Reserve Network (WHSRN) in 2004. The Alaksen National Wildlife Area was originally designated as a Ramsar Wetland of International Significance in 1982. In 2012, this site was expanded from 586 to 20,682 ha, capturing Burns Bog, Sturgeon Bank, South Arm Marshes, Boundary Bay, and the Serpentine, and renamed the Fraser River Delta Ramsar Site. Roberts Bank Wildlife Management Area remains to be included in this Ramsar designation.

More than 25 non-government organizations, municipal, provincial and federal government agencies, academic institutions and private environmental consulting companies are actively working to research, monitor, build awareness, and improve habitat for birds and other wildlife within the IBA, including the Boundary Bay Conservation Committee, the Friends of Semiahmoo Bay Society, the A Rocha Field Centre, Burns Bog Conservation Society, Delta Naturalists' Society, White Rock and Surrey Naturalists, Nature Vancouver, Langley Field Naturalists, Surrey Environmental Partners Society, WildResearch, Bird Studies Canada, BC Nature, Pacific Wildlife Foundation, Little Campbell Watershed Society, TerraNova Birders, the Ladner and Tsawwassen Rotary Club, the Centre for Wildlife Ecology at Simon Fraser University, and Environment Canada, to name a few. From 1985 -2013, the now defunct Fraser River Estuary Management Program provided a framework for environmental coordination in conjunction with ongoing economic development, but effective ecosystem-scale conservation planning and management has always been, and continues to be, challenged by the large number of local, provincial and federal authorities with jurisdiction over different parts of the IBA.

Catégories ZICO Habitats Usages Menaces Potencielles ou Existantes Status de Protection
Plongeon catmarin
Nombre Année Saison
3492012Hiver
405 - 4872001Printemps
7 0002000Printemps
Goéland arctique (thayeri)
Nombre Année Saison
110 - 3002017Hiver
1502016Hiver
6002015Hiver
205 - 5002014Hiver
1712013Hiver
2452013Printemps
200 - 2882012Hiver
1612011Hiver
312011Automne
500 - 1 0442010Hiver
1872009Printemps
187 - 2002009Hiver
200 - 4172008Hiver
320 - 4172007Hiver
80 - 2562006Hiver
100 - 2052005Hiver
167 - 2052004Hiver
155 - 1672003Hiver
45 - 1552002Hiver
1262001Printemps
243 - 6232001Hiver
100 - 2842000Hiver
912000Automne
115 - 8511997Hiver
1151997Printemps
5001996Hiver
139 - 1 5131995Hiver
5121994Hiver
3321993Hiver
183 - 6941991Hiver
96 - 7281990Hiver
Bécasseau d'Alaska
Nombre Année Saison
30 0002015Printemps
30 000 - 64 6002014Printemps
28 0002013Printemps
30 000 - 50 0002012Printemps
20 000 - 175 9802010Printemps
50 000 - 120 0002009Printemps
139 8402008Printemps
171 0002007Printemps
166 6052006Printemps
106 6402005Printemps
77 7702004Printemps
110 9362003Printemps
100 3032001Printemps
174 0002000Printemps
20 0001995Printemps
500 0001992Printemps
45 3001990Automne
55 8181988Été
13 6581978Été
180 044?Autre
Macreuse à front blanc
Nombre Année Saison
15 0002015Hiver
1 6002011Hiver
8002010Hiver
1 1412009Printemps
10 0002009Hiver
1 0002008Printemps
1 5002007Printemps
6 0002006Hiver
6 0002005Printemps
6 0002005Hiver
8 0002004Automne
9362003Hiver
3 0002002Printemps
6 000 - 28 2002001Printemps
6 4002001Hiver
10 000 - 90 0122000Printemps
10 4002000Hiver
18 0001998Printemps
8 0001997Printemps
Goéland à ailes grises
Nombre Année Saison
5 0002018Hiver
5 000 - 10 0002017Hiver
4 500 - 7 0002016Hiver
4 800 - 6 5002016Automne
5 0002015Hiver
7 0002015Automne
17 0392014Hiver
37 0792013Hiver
38 5372012Hiver
4 000 - 40 5632011Hiver
6 742 - 46 4242010Hiver
40 594 - 47 9292009Hiver
47 9292009Printemps
30 0492008Hiver
6 000 - 53 3802007Hiver
6 000 - 55 8032006Hiver
6 934 - 55 8032005Hiver
4 126 - 6 9342004Hiver
5 000 - 47 7282003Hiver
28 472 - 47 7282002Hiver
28 472 - 32 1882001Hiver
5 0002001Automne
8 366 - 32 1882000Hiver
5 0001998Hiver
7 5211997Hiver
19 000 - 20 5311995Hiver
4 724 - 42 0001994Hiver
20 6071993Hiver
5 000 - 10 8001992Hiver
9 000 - 22 0361991Hiver
25 3891990Hiver
44 8321980Hiver
Bécasseau variable
Nombre Année Saison
15 000 - 18 0002018Hiver
30 0002017Hiver
15 000 - 20 0002017Automne
15 0002017Printemps
17 000 - 30 0002016Automne
11 800 - 30 0002016Printemps
13 293 - 41 0002016Hiver
15 000 - 40 0002015Automne
13 050 - 40 0002015Printemps
35 000 - 50 0002015Hiver
15 000 - 30 0002014Hiver
12 000 - 20 0002014Automne
15 0002014Printemps
20 000 - 50 0002013Hiver
15 000 - 28 0002013Printemps
18 000 - 48 2132012Hiver
20 0002012Automne
15 000 - 50 0002012Printemps
12 354 - 50 5562011Hiver
17 000 - 40 0002011Automne
12 060 - 70 0002011Printemps
14 500 - 55 4972010Hiver
15 0002010Automne
20 000 - 50 5732010Printemps
15 000 - 42 4132009Hiver
30 0002009Automne
42 413 - 50 6542009Printemps
12 000 - 65 0002008Hiver
12 600 - 85 0502008Printemps
15 000 - 56 5442007Hiver
40 0002007Automne
23 000 - 78 9602007Printemps
20 312 - 41 3792006Hiver
105 0002006Automne
46 3782006Printemps
25 508 - 65 8612005Hiver
50 7212005Printemps
65 861 - 79 5072004Hiver
105 6002004Printemps
79 507 - 84 7732003Hiver
61 3342003Printemps
15 000 - 84 7732002Hiver
12 000 - 20 0002002Automne
16 000 - 60 4932001Hiver
15 000 - 26 8112001Printemps
12 500 - 60 4932000Hiver
17 000 - 60 0002000Automne
15 000 - 26 0002000Printemps
30 0001999Automne
12 485 - 16 3721998Hiver
16 930 - 35 1201997Hiver
16 9301997Printemps
18 0001996Printemps
50 0001996Hiver
28 953 - 29 0001995Hiver
20 0001995Printemps
13 570 - 16 9001994Hiver
33 1681993Hiver
49 7131992Hiver
25 0001992Automne
17 381 - 61 1061991Hiver
20 0051990Hiver
92 8051989Hiver
53 0171988Hiver
76 398 - 97 4811988Automne
126 2851988Printemps
60 0001978Hiver
50 0001976Automne
36 464?Autre
Grèbe élégant
Nombre Année Saison
1 6002017Automne
1 0002014Printemps
1 0002011Printemps
2002010Hiver
3532009Automne
4702008Printemps
2102007Printemps
2602006Automne
6502005Hiver
9002004Hiver
2 0932003Automne
1 400 - 3 2002003Hiver
2 4262002Printemps
1 3002001Printemps
1 5002001Hiver
1 4332000Automne
942 - 7 2732000Printemps
2 1612000Hiver
1 0001999Hiver
1 000 - 3 0001998Automne
5 0001996Hiver
1 4951991Hiver
1 052 - 2 1091988Automne
1 0681988Printemps
Grèbe jougris
Nombre Année Saison
5802015Automne
6362014Automne
4192013Automne
3922012Automne
922011Automne
1752010Automne
790 - 7912009Automne
3622008Automne
2272007Automne
1512006Automne
912005Automne
2422004Hiver
4852003Hiver
462 - 8102002Automne
2 7162002Printemps
7102001Automne
780 - 1 0002000Automne
7031999Hiver
603 - 7001999Automne
2 5761998Automne
5001997Automne
Cygne trompette
Nombre Année Saison
4502018Hiver
3772017Hiver
3102016Hiver
440 - 5002015Hiver
300 - 8122014Hiver
2752013Printemps
500 - 6502013Hiver
1 4182012Hiver
2942012Automne
375 - 9032011Hiver
3302011Automne
287 - 1 8672010Hiver
400 - 4382010Automne
300 - 1 4552009Hiver
4302009Printemps
2842008Automne
432 - 7232008Hiver
357 - 9262007Hiver
343 - 5002007Printemps
260 - 9262006Hiver
692 - 9332005Hiver
260 - 9332004Hiver
297 - 8532003Hiver
260 - 8532002Hiver
810 - 8342001Hiver
8102000Hiver
3001999Hiver
270 - 5731998Hiver
500 - 8601997Hiver
5511997Printemps
400 - 5101996Hiver
311 - 6451995Hiver
3751995Automne
425 - 7761994Hiver
300 - 7001992Hiver
3251991Hiver
4311990Hiver
Pluvier argenté
Nombre Année Saison
2 0002018Hiver
2 500 - 3 2002017Automne
3 3602016Printemps
2 0002015Automne
1 7202015Printemps
2 1002015Hiver
3 1602014Hiver
2 000 - 2 5002014Automne
2 000 - 2 5002013Automne
1 700 - 2 5002012Automne
1 792 - 2 1342011Hiver
2 000 - 5 0002011Automne
1 600 - 3 0402010Automne
3 0402010Été
1 8082009Hiver
1 600 - 2 0002009Automne
2 5002008Automne
2 1042008Printemps
1 7052008Hiver
1 948 - 3 7282007Hiver
3 0002007Automne
3 7282006Hiver
2 8002006Automne
1 613 - 6 8552005Hiver
2 1152005Printemps
6 028 - 6 8552004Hiver
5 7502004Automne
1 950 - 6 0282003Hiver
1 7002003Automne
1 9502002Hiver
2 0002002Automne
1 2422001Hiver
2 000 - 2 5002000Automne
8 0002000Printemps
3 0001994Automne
2 0611992Hiver
1 6001990Hiver
4 2861988Automne
4 5471988Printemps
Harle huppé
Nombre Année Saison
5 0002001Printemps
2 1202001Hiver
6 7002000Printemps
Canard d'Amérique
Nombre Année Saison
20 000 - 32 4202017Automne
20 0002015Hiver
20 0002015Automne
19 5862014Hiver
30 480 - 51 3142013Hiver
17 7992012Hiver
11 450 - 58 8602011Hiver
25 054 - 38 8172010Hiver
15 659 - 22 0002010Automne
14 284 - 25 0542009Hiver
28 0002008Automne
37 4382008Hiver
19 700 - 37 4382007Hiver
21 650 - 37 0002007Automne
15 122 - 48 2032006Hiver
22 000 - 35 5002006Automne
20 143 - 48 2032005Hiver
20 143 - 47 2522004Hiver
43 0002004Automne
23 886 - 47 2522003Hiver
35 418 - 39 2352002Hiver
35 418 - 50 8712001Hiver
50 8712000Hiver
25 0002000Automne
22 5711998Hiver
27 3001997Hiver
30 170 - 30 5001995Hiver
25 8531994Hiver
53 1791993Hiver
28 9891992Hiver
57 9011991Hiver
29 2741988Hiver
34 144 - 50 6101988Automne
42 7261982Hiver
Canard pilet
Nombre Année Saison
30 0002016Automne
20 000 - 25 0002015Automne
23 8112013Hiver
25 0002012Automne
21 4962011Hiver
14 4152011Automne
11 232 - 38 6852010Hiver
18 000 - 33 0002010Automne
12 9592009Hiver
17 9312008Hiver
15 500 - 27 9192007Hiver
27 9192006Hiver
19 5002006Automne
11 4432005Hiver
17 000 - 36 5002004Automne
43 8302004Hiver
25 730 - 43 8302003Hiver
17 098 - 25 7302002Hiver
31 4132001Hiver
31 4132000Hiver
31 600 - 37 0002000Automne
23 092 - 24 9401995Hiver
39 1851994Hiver
23 0531993Hiver
26 0701992Hiver
55 0701991Hiver
29 1721988Hiver
22 412 - 30 3991988Automne
10 1861988Printemps
48 9811982Hiver
Corneille d'Alaska
Nombre Année Saison
11 000 - 13 2322012Hiver
29 1182011Hiver
12 3292010Hiver
Bécassin à long bec
Nombre Année Saison
1 500 - 2 6002010Automne
Mouette de Bonaparte
Nombre Année Saison
4 0002013Printemps
Macreuse brune
Nombre Année Saison
12 1112001Printemps
6 300 - 10 0102000Printemps
Goéland cendré
Nombre Année Saison
6772009Automne
1 6632008Hiver
1 2172007Automne
1 4592006Hiver
3 7702005Hiver
1 748 - 3 7702004Hiver
6292003Automne
8982002Hiver
4 5322001Printemps
3 6262001Hiver
5 9102000Printemps
Fuligule milouinan
Nombre Année Saison
5 1032007Hiver
6 9002000Printemps
6 1661993Hiver
6 000 - 8 1651991Hiver
Bernache cravant
Nombre Année Saison
3 0002017Printemps
4 5002016Printemps
4 8002014Hiver
2 8392013Hiver
4 3702013Printemps
3 5002012Printemps
1 0512012Hiver
1 4762011Hiver
1 3782011Automne
4 0802010Automne
3 1002010Printemps
2 8782006Hiver
2 4282000Printemps
27 - 4 7511999Printemps
2001999Hiver
4 7631998Printemps
Sarcelle d'hiver
Nombre Année Saison
23 4721991Hiver
Bécasseau sanderling
Nombre Année Saison
2 500 - 3 0002011Printemps
Grand Héron
Nombre Année Saison
50 - 862018Hiver
38 - 622017Hiver
45 - 802017Automne
200 - 4402017Été
38 - 3402017Printemps
42 - 1532016Hiver
35 - 2002016Automne
68 - 4002016Été
250 - 3322016Printemps
40 - 1802015Automne
100 - 3002015Été
35 - 1702015Printemps
111 - 1752015Hiver
35 - 3172014Hiver
35 - 602014Automne
132 - 3752014Été
40 - 2662014Printemps
38 - 1842013Hiver
36 - 1052013Automne
40 - 1902013Été
51 - 2682013Printemps
85 - 2452012Hiver
50 - 622012Automne
60 - 4002012Été
35 - 1572012Printemps
125 - 2122011Hiver
50 - 812011Automne
53 - 2232011Été
44 - 2782011Printemps
35 - 2582010Hiver
40 - 702010Automne
35 - 372010Été
38 - 1502010Printemps
158 - 2582009Hiver
41 - 1002009Automne
34 - 1252009Été
50 - 1582009Printemps
35 - 952008Automne
50 - 1682008Été
45 - 2022008Printemps
2022008Hiver
115 - 2792007Hiver
34 - 752007Automne
34 - 832007Été
402007Printemps
123 - 2792006Hiver
40 - 902006Automne
802006Été
622006Printemps
50 - 2932005Hiver
43 - 1682005Automne
752005Été
2622004Hiver
34 - 962004Automne
4522004Été
36 - 702004Printemps
114 - 2542003Hiver
37 - 502003Automne
64 - 1452003Été
1502003Printemps
35 - 2972002Hiver
50 - 1972002Automne
912002Été
162 - 2972001Hiver
35 - 722001Automne
80 - 1102001Été
41 - 752001Printemps
109 - 2692000Hiver
35 - 862000Automne
34 - 1202000Été
36 - 572000Printemps
121 - 1501999Hiver
50 - 1941999Automne
36 - 4001999Été
94 - 1711998Hiver
341998Automne
1201998Été
451998Printemps
35 - 961997Automne
35 - 1391997Printemps
74 - 1391997Hiver
6921997Été
1001996Hiver
50 - 771996Automne
84 - 2061995Hiver
50 - 591995Automne
51 - 1 0001995Été
881995Printemps
128 - 1551994Hiver
35 - 401994Automne
4091994Été
46 - 2001994Printemps
82 - 2001993Hiver
50 - 1501993Automne
1501993Printemps
36 - 2181992Hiver
36 - 601992Automne
501992Printemps
140 - 2151991Hiver
471991Printemps
2221990Hiver
2511981Hiver
Effraie des clochers
Nombre Année Saison
72016Hiver
7 - 122014Hiver
72013Hiver
9 - 202012Hiver
982012Été
72011Hiver
622011Été
10 - 172010Hiver
822010Été
11 - 172009Hiver
112009Printemps
802008Été
92008Hiver
9 - 142007Hiver
602007Été
11 - 142006Hiver
132005Hiver
62004Hiver
142003Hiver
14 - 152002Hiver
13 - 152001Hiver
11 - 172000Hiver
12 - 141999Hiver
8 - 111998Hiver
8 - 121997Hiver
81996Printemps
15 - 191995Hiver
13 - 151994Hiver
15 - 241993Hiver
151992Hiver
12 - 211991Hiver
141990Hiver
Faucon pèlerin
Nombre Année Saison
32018Hiver
2 - 42017Hiver
2 - 52017Automne
22017Été
22017Printemps
2 - 92016Hiver
2 - 32016Automne
22016Été
22016Printemps
22015Hiver
2 - 52015Automne
32015Été
2 - 42015Printemps
2 - 282014Hiver
3 - 52014Automne
22014Été
2 - 42014Printemps
2 - 132013Hiver
2 - 62013Automne
22013Printemps
2 - 152012Hiver
2 - 42012Automne
2 - 32012Printemps
2 - 242011Hiver
2 - 52011Automne
2 - 32011Printemps
2 - 182010Hiver
2 - 42010Automne
2 - 52010Printemps
2 - 292009Hiver
22009Automne
2 - 172009Printemps
2 - 42008Hiver
2 - 42008Automne
2 - 32008Printemps
2 - 132007Hiver
22007Automne
2 - 212006Hiver
22006Automne
22006Printemps
2 - 212005Hiver
2 - 172005Automne
2 - 162004Hiver
22004Automne
22004Printemps
2 - 222003Hiver
2 - 32003Automne
2 - 212002Hiver
2 - 32002Automne
2 - 152001Hiver
2 - 32001Automne
22001Été
22001Printemps
2 - 182000Hiver
22000Automne
22000Printemps
3 - 61999Hiver
2 - 31999Automne
4 - 61998Hiver
2 - 31998Automne
2 - 51997Hiver
2 - 31997Automne
51997Printemps
31996Hiver
21996Automne
2 - 71995Hiver
21995Automne
5 - 101994Hiver
21994Automne
2 - 71993Hiver
2 - 31993Automne
81992Hiver
3 - 81991Hiver
51990Hiver
Petit-duc des montagnes
Nombre Année Saison
12006Hiver
12000Hiver
11999Hiver
11998Hiver
11997Hiver
11995Hiver
11994Hiver
11993Hiver
21991Hiver
21990Hiver
Ictérie polyglotte
Nombre Année Saison
12010Hiver
12010Automne
12009Été
11999Été
Moqueur des armoises
Nombre Année Saison
12012Hiver
11999Printemps
Oiseaux aquatiques
Nombre Année Saison
250 0001995Hiver
180 0001991Hiver
130 421 - 190 1221988Automne