Skipper Skipper

[Desmond Hutchins]

Our workshops have attracted more than 4,000 participants, from purse-seine skippers, crew, ship owners and fleet managers to cannery managers, scientists, and government officials. We also have hosted seabird and sea turtle workshops for longline skippers.

On the ISSF Guidebooks site, we provide in-depth sustainable-fishing guides for tuna skippers and observers in Web and PDF format, including in translation. We also offer tuna and bycatch species identification guides and other practical resources.

This skipper is one of my favorite little skippers in late June and early July. It certainly exemplifies why these insects are called skippers, since they are nearly impossible to follow as they fly quickly from one nectar source to another. You better have your binoculars ready for these skippers! This species should be expected in drier habitats, where it is often seen nectaring on various species of milkweed.

Above, this skipper is a very bright orange with black margins. The male has no stigma, but does have a black mark at the end of the cell. There is usually some darkening of the veins at least on the forewing. The female is much darker with a wider margin, darker veins, and additional black markings towards the body on the forewing. Below, the sexes are both unmarked yellowish orange, with the color definitely duller than the color of the wings above. The fringe is basically the same orange as the under wings.

The skipper is endemic to just a 50 kilometer stretch from Bear Island to Fort Macon State Park, and its total range is less than 3,300 ha. Unfortunately, the skipper is experiencing habitat fragmentation due to urban development, as much of its range overlaps with human activities, buildings and homes.

Partners include North Carolina Aquariums, NC State University CMAST, Michigan State University, the US Fish and Wildlife Service, North Carolina Sea Grant, the North Carolina Botanical Garden, and the Master Gardeners.

In 2019, our vegetation surveys examined the impacts of Hurricane Florence on bluestem density and distribution. The results reflect the scouring effect of the hurricane and, combined with skipper surveys, helped us identify areas in need of additional restoration work.

The host and nectar plants required by the skipper are common dune plants. In Summer 2019, we partnered with the NC Botanical Garden to collect seeds from seaside little bluestem and other common dune plants that provide nectar for the Crystal skipper. These are being grown out for planting in the Fall of 2020.

In Washington, most of the known sites are in the southern Washington Cascades with a few sites located in the south Puget Sound prairies in Thurston and Pierce Counties. It has been state-listed as endangered since 1998 and was a federal candidate for Endangered Species Act listing from 1999-2012. In 1999, only nine sites were known, six from the southern Washington Cascades, and three from the south Puget Sound prairies. However, after an extensive survey effort from 2000-2011, approximately 117 sites and approximately 49 mardon skipper populations were documented in Washington State, with nearly all found in the southern Washington Cascade region. Therefore, the U.S. Fish and Wildlife Service determined that rangewide listing was not warranted.

Mardon skippers were once more broadly distributed on the south Puget Sound prairies. Urban development, forest encroachment, introduction of invasive species, and land conversion to agriculture have reduced the south Puget Sound region prairies and available mardon skipper habitat to a fraction of their previous extent. Today, mardon skippers remain on only three sites: the Artillery Impact Area of Joint Base Lewis-McChord, and the North and South Units of Scatter Creek Wildlife Area (WLA). The numbers of mardon skippers at the Scatter Creek WLA have declined significantly since 2008-2009, from hundreds to only a few individuals documented in 2021. In 2022 and 2023, surveys conducted at both units of Scatter Creek WLA detected no mardon skippers during their flight period. Further monitoring over the next few years will determine if the Scatter Creek WLA populations are extirpated. The dramatic decline in mardon skipper numbers in the south Puget Sound prairies shows that mardon skipper numbers are critically low compared to what has been documented over the last two decades.

Mardon skipper populations are affected by several factors including conifer/shrub encroachment, invasive grasses, grazing by domestic livestock, off-road vehicle use, prescribed and natural fire, recreation, pesticides, issues related to small population size, and climate change-driven factors (e.g., drought, shifts in flowering resource phenology and hydraulic periods). Mardon skippers have limited dispersal abilities. Barriers and distance between sites likely limit recolonization and colonization of new sites. Many populations are small and at risk of extirpation.

Skippers are classified in the order of Lepidoptera (moths and butterflies), within the family Hesperiidae, which now belongs to the superfamily Papilionoidea, the superfamily of butterflies. (Previously, Hesperiidae was placed in its own superfamily, Hesperiodea.) We have about 30 species of skippers in the Bay Area, each belonging to one of two subfamilies: the spread-wings (Pyrginae) and the branded or grass skippers (Hesperiinae).

Skipper is written as a library and is also a multi binary project with2 binaries, named skipper and eskip. Skipper is the HTTP proxyand eskip is a CLI application to verify, print, update or deleteSkipper routes.

A route is one entry in the routing table. A route consists of one ormore predicate, that are used to find a route for a given HTTPrequest. A route can also have one or more filter, that can modifythe content of the request or response. A route can point to abackend, it can be a , meaning that skipper serves the requestsfor the route, a , meaning that the requests will bematched against the routing table again after filters have modifiedthem, or a , meaning that the target backend must be set in a filter.

Dataclients are used to pull route information from a data source. Thedata will be used to create routes according to the dataclient. As aspecial case, for example kubernetes dataclient automatically addsHTTP->HTTPS redirects if skipper is started with -kubernetes-https-redirect.

Package skipper has a Go http.Server and does the ListenAndServecall with the loggingHandler wrapped proxy. The loggingHandleris basically a middleware for the proxy providing access logs andboth implement the plain Go http.Handler interface.

For each incoming http.Request the proxy will create a requestcontext and enhance it with an Opentracing API Span.It will check proxy global ratelimits first and after that lookup theroute in the routing table. After that skipper will apply all requestfilters, that can modify the http.Request. It will then check theroute local ratelimits, the circuitbreakers and do the backendcall. If the backend call got a TCP or TLS connection error in aloadbalanced route, skipper will do a retry to another backend of thatloadbalanced group automatically. Just before the response to thecaller, skipper will process the response filters, that can change thehttp.Response.

Skipper can handle a relatively large number of routes with acceptableperformance, while being able to use any attribute of the incoming HTTPrequests to distinguish between them. In order to be able to do so, thepath matching predicates (Path() and PathSubtree() but not PathRegexp())have a special role during route matching, which is a tradeoff bydesign, and needs to be kept in mind to understand in some cases why acertain route was matched for a request instead of another.

If step #1 matches multiple routes, which means there are multiple routes in the same position of the path tree, and all other predicates match the request, too, then the route with the highest weight is matched.

An eskip.Route is the parsed representation of user input. This willbe converted to a routing.Route, when the routing table is built. Atree of routing.Route will be used to match an incoming Request to a route.

Test versions are released atregistry.opensource.zalan.do/teapot/skipper-test:$CDP_BUILD_VERSIONfor every pull request, limited to only repository members, because ofcompliance and security reasons.

If the route ID has a prefix kube_, then it is a route created bythe Kubernetes dataclient. We do not disallow that you create manuallyroutes with kube_ prefix, but most of the time you should not use itin other routes to differentiate the routes created by otherdataclients, in case you use multiple at the same time.

The Pawnee montane skipper is a species with a narrow distribution that is endemic to Colorado. Fire suppression, development of dams and reservoirs and climate change climate change
Climate change includes both global warming driven by human-induced emissions of greenhouse gases and the resulting large-scale shifts in weather patterns. Though there have been previous periods of climatic change, since the mid-20th century humans have had an unprecedented impact on Earth's climate system and caused change on a global scale.

Learn more about climate change are all threats to the persistence and recovery of this federally threatened species, as noted in the 2020 amendment to the recovery plan.

The skippers occur in dry, open ponderosa pine (Pinus ponderosa) woodlands at an elevational range of 6,000 to 7,500 feet. The slopes are moderately steep with soils derived from Pikes Peak granite as described in the recovery plan from 1998. The understory is limited in the pine woodlands. Blue grama grass (Bouteloua gracilis) and prairie gayfeather (Liatris punctata) are two necessary components of the ground cover strata. Blue grama grass is the primary plant for egg deposition, larvae feeding, larvae overwintering and pupation. The prairie gayfeather is the primary nectar plant for adult skippers, as noted in the 5-year review in 2011. The 1998 recovery plan notes that small clumps of blue grama occur throughout the warm, open slopes inhabited by skippers and that prairie gayfeather occurs throughout the ponderosa pine woodlands. Skippers are very uncommon in pine woodlands with a tall shrub understory or where young conifers dominate the understory.

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