Pest and Diseases

What Are Yellow Flies And How To Get Rid of Them

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Yellow flies also referred to as yellowish or yellow-winged flies are small biting insects that are capable of infesting many outdoor environments. They are attracted to sweat and body odors; therefore, they can be a nuisance for people engaging in outdoor activities. 

Their bites may be painful and uncomfortable. Knowledge of their operations and how to prevent them is crucial as it helps reduce their occurrence to acceptable levels that do not interfere with the comfort of outdoor activities.

What are Yellow Flies?

Yellow flies are small, biting, winged insects that belong to the Tabanidae family and are related to horseflies and deer flies. It is characterized by a bright yellow color and it is excruciating when it bites. Generally associated with moist, wooded environments around water sources such as swamps or puddles, yellow flies are diurnal.

They have a strong exterior with large complex eyes and wide wings which sets them apart from other insects. These are voracious feeders, which prefer taking blood meals of both humans and animals.

How to Identify Yellow Flies?

Source : inaturalist

The identification of these flies requires consideration of several factors such as morphology, ecology, and ethology. So, if you are wondering what is a yellow fly, and how to identify them, here are a few ways to spot them:

Visual Inspection

Yellow flies are particularly known for their bright yellow color which can come in a variation from lemon yellow to more of a gold color. They possess large, oval-shaped eyes of green, blue, or purple hue which makes them stand out.

The wings are often transparent or slightly yellowish and their general body build is robust but elongated. Identifying these flies requires looking for these easily noticeable colorations and body characteristics.

Habitat

Yellow flies are usually found in an environment that has high humidity and vegetation cover. These are usually located close to water sources, be it ponds, marshes, or swamps since they are known to lay their eggs there.

They are mainly found in places where there are trees or bushes where the animals like to hide. Regarding their breeding sites, one needs to find places with stagnant water or vegetation since these insects prefer to reproduce and rest in such conditions.

Behavior

It has been noted that yellow flies are aggressive especially when searching for blood meals. They are characterized by their insistent and annoying gnawing which is usually painful and invasive.

These flies are mainly seen during the day and are attracted by warmth and the carbon dioxide produced by the mammals. These insects prefer to feed on humans and other animals and are easily seen to be aggressive, mainly when searching for food.

Color

The yellow flies are characterized by a predominant yellow color. This may range from a bright color that is almost neon-like to a yellow that is more dull and resembles the color gold.

The actual color may vary from species to species but the yellow hue is present in all the varieties. The brightness of their coloration makes them stand out, especially against darker backgrounds.

Body Structure

The larvae of yellow flies have a large, rounded abdomen and strong legs. Their wings are large in size and are fixed horizontally over their bodies when they are still.

They are equipped with complex compound eyes that are large and frequently brightly pigmented, helping them to acquire hosts. Their body is usually muscled to support the act of biting, they also have efficient mouth organs for sucking blood.

How To Get Rid of Yellow Flies

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To get rid of the biting yellow flies, one needs to follow the given steps.

1. Apply Natural Remedies

Instead of using chemicals, one can use natural substances such as essential oils to chase away the yellow flies. Fly repellents include oils like eucalyptus, citronella, and lavender among others.

They can be massaged on the skin once they are diluted with a carrier oil or used in diffusers and sprays around the outside environment. Orange oil is fragrant and effective to use when repelling yellow flies as well. It reinforces its effectiveness when re-applied or diffused in a steady manner.

2. Install Bug Zappers

Yellow flies are trapped and killed using an electric grid after being attracted by an ultraviolet (UV) light. Install the zappers at the appropriate location where yellow flies are frequently seen outdoors. Make sure they are located well off the seating area to avoid flies landing directly on people.

Clean the zappers frequently to ensure they work properly since the buildup of dead bugs hampers their performance. These yellow fly pests can be eliminated by zappers since they can kill them before they get close to humans or animals.

3. Apply Insecticides

There is a class of insecticides for biting flies and they can help to reduce yellow fly numbers. It is recommended to apply sprays, foggers, or aerosols specifically meant for the elimination of yellow flies.

Use these products as per the manufacturer’s instructions; on the areas where flies are most likely to be found, such as close to water sources or areas with shade. The insecticides affect the nervous system of the flies and hence kill them. However, it should be used with caution as it is harmful to the environment.

4. Maintain Cleanliness

Yellow flies are drawn to all forms of food particles and wastes. Cleaning of the outside space minimizes their draw. Wash dishes as soon as they are used, wipe off counters and floors after accidents occur, and take out garbage on a daily basis. Grills, picnic areas, as well as dining spaces should be cleaned after use.

It also makes your surroundings less suitable for yellow flies as they are denied any possible food source. Routine cleaning can greatly minimize their populations and lower the chances of their nesting near outdoor entertaining areas.

5. Remove Standing Water

Yellow flies are common around standing water since they lay their eggs in such areas. To counter this, do away with areas of water stagnation within your premises. This comprises washing of birdbaths, emptying of flowerpot saucers, and checking for blockages in gutters.

Ensure to monitor and repair any part of the structure where water may deposit. Yellow flies cannot breed in well-drained soil and get destroyed when you eliminate water, thus, making your environment less suitable for these insects.

6. Use Fly Traps

Yellow fly traps are intended to capture and minimize the number of the yellow fly. They use color and scent to bait the flies and immobilize them on a sticky surface once they are trapped. There are also live exit traps that can be baited using pheromones or food smells to attract the flies.

These traps should be installed in spaces frequented by yellow flies. To make the traps effective, one should check them often and replace them when they are no longer effective. By catching as many flies as possible, the traps assist in controlling and reducing the general population.

Source : bloomscape

7. Use Insecticidal Soaps

Insecticidal soaps can be utilized to control the yellow fly population by eliminating the flies. These soaps dissolve the waxy layers on the body surface of the insects hence causing them to dehydrate or suffocate to death.

Use insecticidal soaps in areas that are likely to be frequented by yellow flies, for instance, around plants or at resting sites. Use the product as directed and reapply as necessary. This method can be used to reduce the number of yellow flies in a particular area of focus.

8. Wear Protective Clothing

Protective clothing can act as a barrier through which you cannot easily be stung by yellow flies. Wear light-colored and long-sleeved shirts and trousers since the yellow flies are known to be attracted to bright colors and uncovered body skin.

Select clothes that obscure most of the skin as a way of avoiding annoying fly invasions. For extra measure, it is recommended to use permethrin, a repellent for fabrics and clothing in particular. This protective clothing coupled with the treatment can greatly minimize the chances of a yellow fly bite.

9. Create Barriers

Physical exclusion through nets or screening is also a viable method of excluding yellow flies from certain spaces. Ensure you cover the patios, eating areas, or over the food tables with screens since this would place a barrier between you and the flies.

It can also be used to cover outdoor furniture and sleeping areas. Check to see that the barriers are tight and there are no openings through which flies could penetrate. This method offers an opportunity to get rid of yellow flies and engage in other activities.

10. Use insect repellents

By using repellents composed of DEET, picaridin, and oil of lemon eucalyptus, one can discourage yellow flies. On the exposed parts of the skin, use these repellents as described on its label. Use again depending on the occasion, for instance, when you are sweating or handling water.

Repellents containing DEET are effective and can provide several hours of protection against mosquitoes. The oil of lemon eucalyptus is an option that is less chemical-oriented and recommended for those who prefer natural protection.

11. Prune Vegetation

Cutting and trimming vegetation around your compound plays a major role in eradicating yellow flies. Mow lawns, bushes, tall grasses, and shrubs to areas where flies might perch or lay their eggs. Mowing the lawn and trimming the grass off reduces the chances of the yellow flies breeding and nesting within the compound.

Monitor the vegetation so that it does not grow to provide a suitable breeding place for flies. This eliminates the possibility of the yellow flies breeding close to your areas of interest if you have regular outside living spaces.

12. Install Fans

Outdoor fans can indeed discourage the presence of yellow flies since they are unable to maneuver through any form of air movement. The location of the fans should be in the common areas like the patios or even the dining areas.

The airflow also makes it difficult for the flies to perch and they decrease their chances of coming close to any person. Fans also contribute to making outdoor spaces more comfortable since they help cool the air. Arrange the fans in such a way that they cover the areas with most infestation of yellow flies to get the best results.

13. Consult Professionals

In the case of an extreme or recurrent case of yellow fly invasion, one may be required to seek the advice of a pest control expert. An inspection can be carried out by a professional to examine the breeding places and the level of the infestation.

They employ specific machines and chemicals to eradicate yellow flies in the most efficient manner. Pest control professionals can also give recommendations on how to deal with and avoid future infestations which makes them valuable in controlling yellow flies.

Types of Yellow Flies

Source : roadsendnaturalist

There are several species of Yellow flies, each with different characteristics. Here are some of the types:

Florida Yellow Fly (Diachlorus ferrugatus)

  • Appearance: Measures 6-10 mm, bright yellow body with black spots, wings are clear with a yellowish hue.
  • Behavior: A creature that feeds on blood, with a painful bite. Peaking in the late spring and summer but can occur any time of the year.
  • Habitat: Seem to prefer habitats associated with water and heavy undergrowth in coastal and marshy regions.
  • Significance: Stings can be very uncomfortable. To control the spread and population of these flies, one can drain stagnant water, use repellents, and set traps.

Yellow Horse Fly (Tabanus spp. )

  • Appearance: Yellow horse fly is a large and strong-looking fly with a yellow or yellow-brown coloration of its body. They have big complex eyes which can be green or purple and clear wings with a little hint of yellow. Their body can grow up to 1. 5 inches (3. 8 cm) in length.
  • Habitat: They are mostly located in places with water features including ponds, marshes, and swamps. They like areas with some shrubs and trees as well as areas of vegetation where they can locate their hosts for feeding.
  • Behavior: These flies are serious and persistent biters that are notorious for their stinging sensation. It is drawn to carbon dioxide and body warmth, making it extremely annoying to humans and livestock. during the warm and sunny days, They are most aggressive.
  • Significance: The disease vectors affecting livestock and horseflies are also a nuisance to humans and the environment. Also, their bites can lead to a lot of discomfort and inflammation.

Yellow Deer Fly (Chrysops spp. )

  • Appearance: Yellow deer flies are somewhat smaller than horse flies and are yellow or golden yellow in color. They have unique markings on their wings, these may be white with black spots or bands. They have large eyes which can be green or metallic blue in colour.
  • Habitat: Deer flies are place-specific and are most commonly found in wooded areas, forests, streams, and wet meadows. They like to nest in thickets where they can stay concealed and lay their eggs.
  • Behavior: These flies are capable of inflicting severe pain when they bite their host in order to feed on blood. They are usually nocturnal and are drawn to the motion of prospective hosts during the day. Their bites are capable of provoking severe itching and swelling.
  • Significance: Deer flies are a menace to humans and their livestock. They are capable of carrying diseases and can make people uncomfortable due to their bites.

Yellow Ochre Fly (Philoliche spp. )

  • Appearance: The yellow ochre fly is easily identifiable by its flying color which varies from pale yellow to a deep ochre-yellow. They have clear wings with not much coloration as compared to the horse and deer flies and their body is relatively thin.
  • Habitat: They are mainly located in those areas that are characterized by arid or semi-arid climate, and where vegetation and water sources are scarce. They are not very predominant in areas that are densely populated with trees.
  • Behavior: Ochre flies do not bite as hard as horse and deer flies but feed on blood like the other two. They are day-active and are drawn to warm and sunny climates. Their bites are relatively less painful but they are capable of inflicting irritation.
  • Significance: Even though they are not as terrible as other yellow flies, people can get annoyed by these flies and might get infected by various diseases. Their habitats are widespread but rarer, which is why they are not as explored as other species but just as influential.