Bird protection as an effective method of controlling tree pests.
Bird protection is also noteworthy as one of the biological methods of tree protection. Birds enrich the biocenosis of parks and other tree stands, at the same time, they provide auditory and visual impressions. Almost all species of native songbirds and insectivores are protected by the ordinance of the Minister of LiPD of 4.11.1952 r. (Journal of Laws. no 45, item. 307 with 1953). A very popular form of care is the so-called. active protection of useful birds. This activity consists in ensuring favorable nesting conditions and feeding in the winter. Many of the most useful birds, how: tit, woodpeckers, spaki, wagtail, flycatchers, Owls, lives in hollows; these are the so-called. hollows. As a result of removing old trees and securing wood losses, the living conditions of these hollows are deteriorating. However, they willingly use artificial nests instead, the so-called. nesting boxes. Boxes of four types designed by J.. Sokołowski. The technical description of the nest boxes is given in the publication "Protection of plants" by PWRiL, Warsaw 1956.
The first type is intended only for tits. Type two - for tits, the blacksmith, creeper, tortuous head, funeral flycatcher, wagtail, the little woodpecker. The third type is universal; apart from the previously mentioned species, it is also inhabited by starlings and woodpeckers. The fourth type is intended for a hoopoe, pigeon bruise, kraski, kestrels and owls. Boxes of all types should be hung in order to advantageously diversify the species composition of birds in relation to types 1:2:3:4 = 2:3:3:1.
The boxes should be hung tightly, facing east or south-east with the openings, slightly leaning forward, which prevents water from getting inside.
The colonization of nesting birds is favored by the presence of dense clusters of shrubs and trees. Birds inhabit most often trees and shrubs with high branching capacity and prickly spikes, thorns, needles etc., which protects their nests from predators.
Suitable food for birds is laid out in parks and forests from November to March. The construction and arrangement of feeders should ensure food protection against snow and rain. Many birds willingly use the prepared drinkers. Tree nests should, in some cases, be protected against cats by using protective devices.