Dispersal presumably does occur but unlike most insects which use their wings for dispersal, this species probably seldom flies. Some species grow as long as 4 inches (10 cm). and H. Söderberg. The habitat at this spring was characterized by a faint trickle of water exiting a crevice approximately half–way down a rocky cliff (Figure 6). The late Dr. Robert E. Roughley was a Professor of Entomology at the University of Manitoba. Roughley. The adults of most are between 1 and 2.5 cm long, though much variation is seen between species. The course was offered through the University of the Arctic. Canada. Many feed on fish food in captivity. Microreticulation evident over entire dorsal and ventral surface. Males and females very similar; males with protarsomeres 1 to 3 slightly expanded and with larger scales on ventral surface. EO and IAO are below thresholds, the species is known from a single location, and there is a continuing decline in the quality of the species’ habitat. Family : Belostomatidae (giant water bugs) in the order Hemiptera (true bugs) Description : “Giant water bug” perfectly describes the members of this family, as these hefty aquatic insects can reach 2 inches in length. Are there extreme fluctuations in area of occupancy? (1986). 7067. Regardless of destruction by cattle, the cumulative impacts of an already highly altered ecosystem, the demands of a growing economy, continued development (Figures 14, figure 1515) and the effects of climate change pose serious concerns of lowering groundwater tables and in turn the existence of the springs and see pages required by Bert’s Predaceous Diving Beetle. The global range is thus confined to a small portion of Canada. Jennie has been a professional aquatic biologist for the past 5 years. Memoirs of the Entomological Society of Canada. 202–228. As with some similar species, Bert’s Predaceous Diving Beetles appear to require springs and seepage areas with the appropriate fine–grained substrate of sand and other fine particulates and an undisturbed area with mosses over fine particulate soil (necessary for pupation). 1194–1205. Scott Tupper, the younger generation of the duo, told Truly how the idea developed. Point sources of nutrients which can alter water chemistry also result from the feces of the ranched cattle which are spread across the landscape but appear to be concentrated near water where the cattle congregate (Figure 11). 73 (2): pp. The image is available for download in high resolution quality up to 4045x2697. Töyrä, and A.N. Dec 15, 2020 View the CLASSIFIED documents for yourself: Keean Bexte speaks to a few Chinese nationals near the former CFB Penhold, a decommissioned Canadian Armed Forces base near Red Deer, Albert… The Dytiscidae – based on the Greek dytikos, "able to dive" – are the predaceous diving beetles, a family of water beetles. The Committee on the Status of Endangered Wildlife in Canada (COSEWIC) was created in 1977 as a result of a recommendation at the Federal–Provincial Wildlife Conference held in 1976. Nilsson, A.N. Water is most scarce in southern Alberta where human water demands are the highest in the province (Alberta Environment 2008). These are: 1) the northwest bank of the Oldman River immediately upstream of the Highway 2 crossing west of Fort MacLeod, Alberta; 2) Fort MacLeod; and 3) the newly discovered locality near Head–Smashed–In Buffalo Jump. There is no evidence of the length of time required for the larvae to develop, pupate and emerge as adults, other than the observation of timing of collection of adults. There are no subspecies of Bert’s Predaceous Diving Beetle nor is there noticeable variation among the available specimens and the entire taxon is confined to a very small geographic location. Roughley, R.E. (Photo courtesy of Jennie Knopp. Oldman River Basin Water Quality Initiative. Schindler and Donahue (2006) warn of the coming drought that Alberta will face in the next few decades as a result of human pressures on the system, natural environmental fluctuations and climate change, but there remains some debate on how serious this is likely to be. Trend in [area and/or quality] of habitat Both general habitat. (Photo courtesy of R.E. Fierce predators, these beetles do not hesitate to attack prey larger then themselves, including small fish, tadpoles and frogs. Withdrawals from the water table are of concern because this directly affects the habitat provided from the outflows (springs and seepages). (Photo courtesy of Jennie Knopp.). Size: Size of the adult diving beetles varies from 2 mm to 45 mm. Bert’s Predaceous Diving Beetle – Hydropore de Bertha. The other layers of the sieve were searched visually for any invertebrates, which were removed by aspiration into a small vial. The species assigned to this genus live in a limited variety of habitats–from caves and winter–early spring rain pools to springs and seeps. Bert’s Predaceous Diving Beetle populations are believed to be reproductively isolated. This is a predaceous diving beetle (Coleoptera: Dytiscidae). Impoundments along the Oldman River would drown the spring or seep habitat or result in lowered water levels along the course of the river. 1991. Since European settlement in this Ecozone, it has become one of the most developed agricultural areas in the world. Field searches specifically for this species, the first efforts since the species was first described and collected in 2000, were conducted by Knopp, Roughley and De Kerckhove. Cattle droppings within the oasis habitat. This corresponds to latitude ~49°43′32″N 113°23′51″W. They are common in temporary pools, wetlands, marshes, ponds and slow sections of flowing waters. ), Figure 8. Current location of captures near Head–Smashed–In Buffalo Jump, Alberta (facing west), Figure 7. [Observed, inferred, or projected] trend in extent of. Irrigation equipment north of Head–Smashed–In Buffalo Jump (near Twp 104, facing south). vii + 27 pp. Vegetation, such as mosses and algae at the outflow of the spring characterize the habitat at the oasis. and D.J. Schindler, D.W. and W.F. Whether natural or…. 2000). In terms of life history pattern, and based on collecting effort, this species appears to fall into one of five quite different categories of life history of temperate species outlined by Nilsson et al. The Committee on the Status of Endangered Wildlife in Canada (COSEWIC) assesses the national status of wild species, subspecies, varieties, or other designatable units that are considered to be at risk in Canada. Your photo at the Giant Divin Hmmm maybe Diving Beetle larva Family Dytiscidae - Predaceous Diving Beetle Yes, a Diving Beetle Seems too big Diving beetle larva I unlinked this Looks like a beetle larva. This habitat is probably very little studied but it is of great interest due to the species–packing with at least three species–S. Almost certainly this locality shares the groundwater system with the UNESCO site. Diving beetles are oval and flat and range in length from 1.5 mm to more than 35 mm (0.06 to more than 1.4 inches). “There are almost 10,000 oil and gas wells in the Oldman River Basin, almost 600 confined livestock feeding operations [feedlots], about 50 recreational site developments and 85 wastewater treatment facilities” (Oldman River Basin Water Quality Initiative 2008). Figure 11. The most serious threats to these fragile point sources of habitat are lowering water levels in the Oldman River Basin and aggregation of livestock at these fragile habitats. Adult specimens are less than 3 mm in length, rather broadly oval in shape (length:width = 1.84 to 1.94). There is no evidence to suggest that the life cycle is anything but annual and likely involves vernal breeding and oviposition with larval development during the summer, followed by a brief terrestrial pupation. 2000. Bert’s Predaceous Diving Beetles require springs and seepage areas with the appropriate fine–grained substrate of sand and other fine particulates; and undisturbed areas with mosses over fine particulate soil (necessary for pupation). Arthropods of springs, with particular reference to Canada: Synthesis and needs for research. Ottawa. Giant Diving Beetle Found washed up on the shore at Topsail Beach, still very much alive and kicking. Geographic locations of Sanfilippodytes bertae captures in southern Alberta, Canada, Figure 6. 2000, p. xiii). The land southeast of the crossing appeared to be private lands and a privately owned campground. The larvae can grow up to 60 millimetres (2.4 in) in length, while the adults are generally 27–35 millimetres (1.1–1.4 in). This report may be cited as follows: COSEWIC. The most serious threats to the single known site and to these fragile point sources of habitat in general are lowering water levels in the Oldman River Basin and aggregation of livestock. The “oasis” view from bottom of the cliff area, facing the location of the spring (facing west), Figure 9. Nilsson, A.N. Because the species is apparently endemic to Canada, rescue from outside cannot be anticipated. Metacoxal lines widely separated anterior to metacoxal processes, metacoxal lines almost parallel and diverging only slightly proximally. There is also no evidence to suggest that the life cycle of S. bertae is anything but annual and likely involves spring breeding and oviposition with larval development during the summer, followed by a brief terrestrial pupation. 28 specimens from same locality and collector (16.iii.1980, 31.iii.1984, 5.v.1984) and 12 specimens labelled Alta, Old Man R., Ft. Macleod, May 5, 1984, Carr and Larson , deposited in various museums (ROM, CMN, Univ. The head and pronotum are dark brown and the elytra are yellowish brown without yellowish spots or markings (Figures 1 and 2). The Oldman River watershed lies within the Prairie Parkland Natural Ecozone. Blackish-green in colour, it can be spotted coming to the surface to replenish the air supply it stores beneath its wing cases. Theystick this siphon out of the water to get… State of Canada's Environment. The Great diving beetle is a very large diving beetle that can be found in ponds and slow-moving water. South bank of the Oldman River immediately east of the Highway 2 bridge (in background), west of Fort MacLeod (facing west). This field work was intended to: a) determine population sizes; b) confirm extreme rarity; c) gather information on threats; and d) acquire biological information relevant to assessment. Latin Name: Dytiscus sp. The historical distribution of S. bertae (Figure 5) includes two and possibly three localities. Bert’s Predaceous Diving Beetle (Sanfilippodytes bertae), Roughley and Larson 2000, Coleoptera: Dytiscidae) is described from the springs and seepages in the arid grasslands of southern Alberta. It is a voracious predator, hunting smaller invertebrates, tadpoles and even small fish. Reason for designation Despite extensive searches, this Canadian endemic species is known from only two locations in southern Alberta, one of which has been destroyed. The data at hand is insufficient to speculate about fluctuation of these populations. ** Formerly described as “Not In Any Category”, or “No Designation Required.”*** Formerly described as “Indeterminate” from 1994 to 1999 or “ISIBD” (insufficient scientific information on which to base a designation) prior to 1994. 83–88. The overwintering stage is the adult. Larson. The crevice where the spring exited the rock contained wet mosses and algae. Water beetles are probably the most entertaining pet arthropods. User Tip: Click on the "X" found on each entry below to hide specific bugs from this page's listing. ), Figure 14. Pronotal bead narrower, not as wide as a median antennomere. Field work by entomologists studying springs has been extensive involving the visitation of many hundreds of sites in the prairie region alone, and although not all of the habitat of S. bertae has been surveyed, enough has been surveyed to allow some reliable conclusions to be drawn. Metasternum laterally with small, dense, subconfluent punctures, metacoxal plate with punctures very small and sparse on disc, punctures separated by 4 to 5 times their diameter, anterolaterally with punctures obscured by shallow, oblique impressions. Index of all insects found in Alberta. The oasis area contained a lot of waste refuse likely blown into the crevice from the high winds observed in the area. Male aedeagus. The head and pronotum are dark brown and the elytra are yellowish brown without yellowish spots or markings. Figure 10. Crop irrigation and feedlot demands are the second largest use of water in Alberta. World Catalogue of Insects, 3, 1–395. Other: Efforts to find S. bertae were conducted in the areas surrounding the collection of the original type specimens near the Highway 2 crossing of the Oldman River in southern Alberta. Other potential threats along the Oldman River Basin (along with the associated coulees, springs and seeps) include: groundwater withdrawals; ranching practices; feedlots; high water withdrawals and demands for agricultural irrigation; increasing water demands resulting from a booming economy and subsequent rapid growth; impoundments which would drown the habitat; municipal and industrial development including oil and gas; increasing demands for water for use in industry and domestic use; human recreation, reproductive isolation; drought; and; climate change. Proceedings of the National Academy of Science. Pronotum with disc with small punctures medially (much larger than those on head), punctures somewhat larger and more dense toward margins, posterior margin with many punctures in subconfluent row, punctures dense on posterolateral angle. Predaceous Diving Beetles (Coleoptera: Dytiscidae) of the Nearctic Region, with emphasis on the fauna of Canada and Alaska. Paratypes. Tried to find some photos online but no luck. Male aedeagus, Figure 4. Bay Tree, Alberta. Consequently information on the distribution, status and habitat of S. bertae in Canada presented here is considered reliable. Springs and seepages are biologically, chemically and physically complex and fragile. There appears to have been a decline from 3 or 2 to 1 population since the populations at Fort MacLeod could not be relocated. 9) grazing, trampling and defecating of cattle (Figs. The spring drains into this narrow lush channel which contained a ground of saturated soil and grasses, a small near–stagnant channel, trees and shrubs. They are found in aquatic environments and both larvae and adult prey on aquatic insects and fish.I found this particular one, already deceased, on the ground beside one of the watering troughs on a recent ranch visit. Holotype. They and their larvae (“water tigers”) are general predators on other small aquatic life forms. Note: Please note that insects do not adhere to man-drawn borders on a map and as such they may be found beyond their listed 'reach' showcased on our website. No population information. Larvae have a siphon, like a snorkel coming out the end of their body. The only record since 1984 and the only extant population is location 3. 155: 125–140. COSEWIC Secretariatc/o Canadian Wildlife Service Environment CanadaOttawa, ONK1A 0H3Tel. Status history Designated Endangered in November 2009. Adults are small (< 3 mm), broadly oval in shape, and dark brown with yellowish-brown elytra (wing covering). Both played an integral role in the completion of this project including field work assistance, editing, and an incredible source of gentle encouragement and support. NRC Research Press, Ottawa. Government of Alberta. It is one of 25 species in the genus Sanfilippodytes Franciscolo 1979 (Nilsson 2001, pp. Would immigrants be adapted to survive in Canada? Carrion beetle, (family Silphidae), any of a group of beetles (insect order Coleoptera), most of which feed on the bodies of dead and decaying animals, thus playing a major role as decomposers.A few live in beehives as scavengers, and some eyeless ones live in caves and feed on bat droppings. Figure 12. Criterion E (Quantitative Analysis): None available. Head–Smashed–In Buffalo Jump is a UNESCO World Heritage site, and the spring almost certainly shares the groundwater system with the UNESCO site. 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