Harry Schmeider   "The Ambassador for the Bluebirds"
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Parasites and Blowfly Larva Solution 

3/18/2013

37 Comments

 
Pictureclick to enlarge
Dealing with nest parasites;
At least 2500 species of mites from 40 families are closely associated with birds, occupying all conceivable habitats in the nests and on the bodies of their hosts. No avian is free from a mite. Bird mites can be divided into those that dwell primarily in, or near, the nest and those that reside mainly on the body of the host. The best studied nest-dwelling mites are blood feeders from the genera Dermanyssus and Ornithonyssus (shown here is a micrograph of a female Ornithonyssus bursa, a common nest parasite of passerines. These mites have short generation times and can rapidly build-up huge populations. For example, half a million northern fowl mites have been extracted from a single nest. Blood-feeding nest mites can reduce the reproductive success of their hosts by slowing development or even killing chicks.


Pictureclick to enlarge
Blowfly Larva is a problem for all cavity nesting species.
Blow fly biology varies among the 1100 species and with environmental conditions so the following information is general.
Each female blow fly deposits thousands of eggs over her 2- to 8-week life span. Egg masses may consist of 1500 to 2,000 eggs, but the larger masses are usually the result of several females depositing eggs at the same location. Hatching usually occurs in less than 24 hours when conditions are warm and humid.The larvae feed by night and move downward into the nesting material during the day. This fascinating adaptation has, no doubt, evolved over many centuries of a close association of blowflies with cavity nesting birds. The larva avoids being eaten by the adult bird during the day, and feeds only after dark, when the helpless nestlings are easy prey.
Blood is usually drawn from the feet or legs, often from between the toes. Depending on the temperature maggots usually complete development in 4 days. At the end of this period, larvae typically burrow in the nesting material and pupate for 5 to 7 days which the adult flies emerge. About a week later, females begin to deposit eggs and the life cycle is repeated. Blow flies usually develop from egg to adult in only 10 to 25 days and complete 4 to 8 generations each year.
Read more about the Blowfly at  
http://www.no-pest.com/Blowfly.htm


Pictureclick to enlarge
Small infestation will weaken the immune system of the nestlings. Large infestation will result in death of the nestlings shown above. This is another reason landlords should closely monitor their nest boxes. Do not be afraid to handle the nestlings and inspect them weekly especially during hot humid weather. If infested gently remove the larva from the nestlings, if necessary remove the nest and make another nest for the nestlings. Birds will not harm or leave their baby nestlings because you handle them. All song birds have a very poor sense of smell anyways.
There's a product I use to kill parasitic and blowfly larva that is not harmful to you or the nestlings. ​Food Grade Diatomaceous Earth - Organic Crawling Insect Killer. With all the concerns about pesticides today - you can rest assured that Diatomaceous Earth is safe & effective. Made from the finely ground fossils of prehistoric fresh water diatoms. Diatomaceous Earth (D.E.) kills common household and garden pests like roaches, ants, fleas, beetles and many others. It is a long lasting control — sprinkles easily into cracks and crevices where bugs hide and wipes them out!
When soft-bodied insects come in contact, D.E. causes massive loss of body fluids and death. When the dust is eaten by insects, the D.E. inhibits breathing, digestion and reproduction. Because it kills by mechanical action rather than poison, insects have not developed immunity. Apply the dust lightly in infested areas.  You can find this product in most lawn and garden areas in your local stores. 

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Tip; Use a plastic mustard (pull up cap) bottle and squeeze a small amount of the power (D.E.) into the middle of the nest. It’s an easy way to control parasites and blowfly larva in the nest box. You can purchase this product most anywhere. For as little as $7.00 a 1.5lb box will last you a long time. I like it because its environmentally safe.

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