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Avian Influenza Outbreak: Ought to You Take Down Your Hen Feeders?


Initially revealed April 20, 2022. Up to date July 20, 2022.

Many individuals are involved concerning the 2022 outbreak of avian influenza, or chicken flu, that has effects on home poultry, waterfowl, raptors, and a few shorebirds within the U.S. and Canada. As a result of the present pressure (H5N1) causes heavy losses to poultry, it’s known as extremely pathogenic avian influenza, or HPAI. Observe that transmission of avian influenza from birds to people may be very uncommon, in keeping with the Facilities for Illness Management. As of July 22, one particular person has examined constructive for avian influenza and developed delicate signs, in Colorado.

There was confusion about whether or not individuals ought to take down their feeders to cease the unfold of this illness amongst wild birds. We checked with Dr. Julianna Lenoch, who directs the USDA APHIS Nationwide Wildlife Illness Program, and we’ve compiled the next summaries of key factors concerning HPAI, particularly amongst songbirds and different feeder guests.

Low Danger of Avian Flu to Songbirds

There may be at present very low danger of an outbreak amongst wild songbirds, and no official advice to take down feeders except you additionally hold home poultry, in keeping with the Nationwide Wildlife Illness Program. We do at all times advocate that you simply clear chicken feeders and birdbaths commonly as a technique to hold many sorts of illnesses at bay.

We additionally at all times advocate that you simply observe any suggestions put out by your state authorities, such because the current request to take down feeders in Illinois. We’ll replace this web page because the scenario develops.

How do we all know songbirds are at low danger?

  • USDA APHIS has a powerful, multiyear surveillance program that routinely samples wild birds, together with flocks of songbirds (and different species corresponding to Rock Pigeons and Mourning Doves which might be typically round people), for the presence of avian influenza. Up to now in 2022, they’ve detected the HPAI pressure in 1,890 wild birds, with 46 detections in songbirds (see under for an inventory of species). Newest data concerning the outbreak.
  • Avian influenza doesn’t have an effect on all varieties of birds equally. The “extremely pathogenic” a part of the time period HPAI refers particularly to the severity of the illness in poultry, not essentially in different chicken species. For instance, waterfowl typically carry and transmit chicken flu, however not often get sick from the illness (even from HPAI strains). Raptors are way more delicate to the illness than waterfowl. Home poultry are extraordinarily inclined to HPAI and unfold the illness simply, resulting in as much as 100% mortality of affected flocks.
  • Songbirds are a lot much less doubtless than waterfowl to contract avian influenza and fewer prone to shed giant quantities of virus, that means they don’t transmit the illness simply. (See Shriner and Root 2020 for an in depth assessment within the journal Viruses.)
  • In keeping with a separate examine within the Journal of Wildlife Illnesses, “…though passerines and terrestrial wild birds could have a restricted function within the epidemiology of IAV [avian influenza A viruses] when related to contaminated home poultry or different aberrant hosts, there isn’t any proof supporting their involvement as pure reservoirs for IAV.” (Slusher et al. 2014)
  • For these causes, it’s unlikely that chicken feeders will contribute to an outbreak amongst songbirds.

If songbirds are at low danger, why are individuals who hold poultry suggested to take down their chicken feeders?

  • The principle concern with songbirds is the prospect {that a} uncommon particular person would possibly transmit an an infection to poultry. This can be a concern as a result of poultry are a lot extra weak than songbirds to HPAI.
  • The important thing intervention is to maintain songbirds away from poultry; it’s much less necessary to maintain songbirds away from one another.
  • You probably have a yard poultry flock, these are crucial steps to take:
    (click on for full data on these biosecurity measures from USDA APHIS)
  • As a secondary measure, USDA APHIS recommends for poultry house owners to take down wild chicken feeders or hold them properly away from their captive flock

In the event you hold nest bins:

Avian influenza is just not often transmitted to people, in keeping with the USDA, however nonetheless our NestWatch undertaking at all times advises good hygiene and extremely recommends that individuals put on disposable gloves and/or wash their fingers totally after checking nest bins. Most birds that use nest bins are songbirds, that are at low danger for contracting or transmitting avian influenza. In the event you monitor waterfowl or raptor nests (e.g., Wooden Duck, Frequent Merganser, Canada Goose, American Kestrel, Barred Owl), we propose you put on gloves, change or wash gloves and disinfect tools between nest bins, put on a masks when cleansing out nest bins, and alter garments and footwear earlier than visiting any home poultry.

If you’re a wildlife rehabilitator:

Wildlife rehabilitators ought to take precautions when accepting sick birds in order that they don’t inadvertently introduce HPAI to the remainder of their sufferers. Right here’s additional steerage for rehabbers, from USDA APHIS. Rehabbers in New York State are additionally inspired to contact the Cornell Wildlife Well being Lab for extra info.

What to do in case you discover a sick or useless chicken:

Keep away from dealing with sick or useless birds. As an alternative, name your state wildlife well being company; they will decide explanation for demise and ship the chicken to the suitable lab for testing. Moreover, hold pets (together with pet birds) away from sick or useless wild birds.

Further Sources:

Wild chicken species with HPAI detections in 2022

Up to date July 20, 2022. Whole variety of detections in wild birds: 1,890. See 2022 Detections of Extremely Pathogenic Avian Influenza in Wild Birds for up to date detections.

Songbirds

American Crow (19, North Dakota; 1, Michigan; 2, Minnesota; 1, Washington; 6, Wisconsin)
American Robin (1, North Dakota)
Black-billed Magpie (3, Wyoming)
Frequent Grackle (1, Montana)
Frequent Raven (5, Alaska; 1, Minnesota; 1, Montana; 1, Washington; 1, Wisconsin)
Darkish-eyed Junco (1, Minnesota)
Fish Crow (1, New York)
Pink-winged Blackbird (1, Michigan)

Non-Songbirds

American Black Duck
American Kestrel
American White Pelican
American Wigeon
Arctic Tern
Bald Eagle
Barred Owl
Black Vulture
Blue-winged Teal
Brant
Broad-winged Hawk
Brown Pelican
Canada Goose
Caspian Tern
Frequent Goldeneye
Cooper’s Hawk
Frequent Loon
Frequent Tern
Cormorant sp.
Darkish-eyed Junco
Double-crested Cormorant
Duck sp.
Dunlin
Eared Grebe
Gadwall
Glaucous Gull
Nice Black-backed Gull
Nice Blue Heron
Nice Horned Owl
Better White-fronted Goose
Inexperienced-winged Teal
Gull sp.
Hawk sp.
Harris’s Hawk
Heron sp.
Herring Gull
Hooded Merganser
Horned Grebe
Laughing Gull
Lesser Scaup
Mallard
Merganser sp.
Muscovy Duck
Mute Swan
Neotropic Cormorant
Northern Harrier
Northern Pintail
Northern Shoveler
Owl sp.
Parasitic Jaeger
Peregrine Falcon
Pheasant sp.
Redhead
Pink-necked Grebe
Pink-shouldered Hawk
Pink-tailed Hawk
Ring-billed Gull
Ring-necked Duck
Ross’s Goose
Tough-legged Hawk
Royal Tern
Ruddy Duck
Sabine’s Gull
Sanderling
Sandhill Crane
Sharp-shinned Hawk
Quick-billed Gull
Snow Goose
Snowy Egret
Snowy Owl
Swainson’s Hawk
Trumpeter Swan
Tundra Swan
Turkey Vulture
Western Screech-Owl
Wild Turkey
Wooden Duck
Wooden Stork

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