Boris Maderič

• PhD.
• Raptor Protection of Slovakia (RPS)

Anthropogenic activities threaten many wildlife populations by increasing mortality rates, making it crucial to identify the locations and causes of mortality to inform conservation actions. Technological advancements, such as GPS satellite tracking, enable precise recording of wildlife movements. High‐resolution data from such devices can facilita...

The breeding behaviour of raptors is determined by many characteristics, such as courtship and mating patterns, nest building, foraging, territorial defence activities, clutch incubation, and caring for the young. Here, we study the breeding behaviour of the Red Kite (Milvus milvus), a European native bird of prey. From a period between 2018 and 20...

Bird crime is a serious problem in many countries around the world. This study focuses on the situation in Slovakia, summarising data on bird crime in the country between 2016 and 2022. Over the course of that period, 92 cases were recorded in 27 districts involving 33 animal species. At least 249 protected birds and 78 mammals fell victim to illeg...

The main goal of the LIFE EUROKITE project is to reduce anthropogenic causes of mortality of the red kite in Europe. The efficient protection of the red kite requires the detailed understanding of overall mortality reasons, especially focusing on those caused by legal and illegal human activities. The LIFE EUROKITE project focuses on a Europe-wide...

Breeding behaviour of raptors is determined by many characteristics such as courtship and mating patterns, nest building, foraging, territory defensive activities, clutch incubation and caring for young. Here, we used European native avian generalist predator, the Red Kite (Milvus milvus), for a study of its breeding behaviour due to the selected b...

The Red Kite Milvus milvus is endemic to the western Palearctic. While the largest breeding population is in Germany, the population density decreases substantially from central to eastern Europe. In 2015, we tagged two young Red Kite females with telemetry loggers in an area with very low kite density in the northeastern part of Slovakia. One of t...

To effectively protect European species such as the Red Kite, a detailed understanding of anthropogenic and non-anthropogenic influences, especially the causes of mortality and spatial context, is required. Modern telemetry techniques are increasingly used to obtain high-resolution information on spatial use. However, collecting such data can be di...

Habitat loss and fragmentation along with altered disturbance regimes cause raptor population declines, but processes, rates and interactions are seldom known. Knowledge gaps remain mainly in large forest-dwelling raptors that use habitats on several spatial scales. Our study focusses on breeding habitats and habitat-associated breeding performance...

In a study of the extent and timing of Red Kite Milvus milvus dispersal movements from Central Europe (Austria, the Czech Republic and Slovakia) using GPS telemetry, we found support for the hypothesis that Red Kite dispersal, including migration behaviour, is dependent on both age and sex. Examination of the tendency to stay in, or return to, a pa...

Habitat loss and fragmentation along with altered disturbance regimes cause raptor population declines, but processes, rates and interactions are seldom known. Knowledge gaps remain mainly in large forest-dwelling raptors that use habitats on several spatial scales. Our study focus on breeding habitats and habitat-associated breeding performance of...

Table 1 in original paper (Slobodník et al. 2017, Slovak Raptor Journal 11: 83–89) was published with incorrect data. Correct version is published here.

The population of the red-footed falcon in Slovakia inhabits the north-western edge of the species' breeding range. This breeding population is relatively small and came near to extinction during the population decline of this species in central Europe in recent decades. Thanks to increasing numbers of breeding pairs in Hungary, the Slovak populati...

Results ot Red Kite telemetry in Centeral Europe

In recent years Imperial Eagle observations (Aquila heliaca) in Italy are increasing; during the winter 2016/17 there were at least 3 individuals, two in Sicily and one in Emilia Romagna. One of them born in Slovakia, was equipped with an with an Ecotone GPS-GSM-UHF logger from TB Raab in cooperation with Raptor Protection of Slovakia to increase t...

GPS-based telemetry studies of Central European Red Kites Milvus milvus – methodical difficulties and analytical opportunities based on the initial results Although satellite telemetry increasingly gains in importance in research on birds of prey, there are relatively few telemetry studies on Red Kites Milvus milvus dealing with behavioural aspects...

During 2008–2011, nine juvenile Saker Falcon Falco cherrug females were tagged with satellite transmitters in Slovakia. Satellite telemetry provided new insights into the juveniles' movements. In this study we present the use of temporary settlement areas (TSAs) during the movement of the tracked juveniles. We characterized natal areas (NAs, the fi...

Several estimates of the lesser spotted eagle breeding population in Slovakia were published in 1955-2002. In this study we estimate the breeding population of the lesser spotted eagle by 1997 and 2014. By 1997, the estimated size of the breeding population was 762 pairs. In 2002 an estimate of the population size by 2000 was published at 800-900 p...

V rokoch 2011 – 2014 sa realizoval monitoring hniezdnej populácie orla krikľavého (Aquila pomarina) v ôsmich chránených vtáčích územiach na Slovensku. U 149 hniezdnych párov z celkových 272 úspešných hniezdení počas 4 hniezdnych sezón vyletelo 277 mláďat. Priemerná reprodukčná úspešnosť predstavovala 0,51 juv./prítomný pár, 0,69 juv./hniezdiaci pár...

In the years 2009-2012 a total of 316 individuals were marked in a colour ringing programme of the population of A. pomarina in Slovakia. From this a total of 39 inds. were ringed with yellow readable plastic rings with a two-place alphanumeric code (all young in a nest) and 277 inds. (273 young and 4 adult inds.) with light-blue rings. For the ent...

V rokoch 2008–2009 sme v rámci projektu LIFE – Ochrana sokola rároha v Karpatskej kotline (LIFE06úNAT/H/000096) metódami satelitnej telemetrie (Microwawe Telemetry, Inc., model vysielačky PTT-100 Solar Argos/GPS s hmotnosťou 22 g) sledovali 5 mladých samíc sokolov rárohov (Falco cherrug) vyletených z hniezd na západnom Slovensku (Malé Karpaty, Bors...

Records of the Lesser Spotted Eagle ( Aquila pomarina ) nests with two fledged young without human intervention in Slovakia An intensive research of the Lesser Spotted Eagle biology is conducted in Slovakia since the 80ties of the 20th century. A lot of attention has been paid to the process of cainism. Despite this strong feature in the species bi...

Colour ringing of the Spotted Eagles ( Aquila pomarina, Aquila clanga and their hybrids) in Europe - a review During the years 2000-2008 1377 Spotted Eagles (SE) ( Aquila pomarina , Aquila clanga and their hybrids) have been colour ringed in Europe. Out of these, 1303 (94.6 %) were young birds and 74 (5.4 %) were adults. Out of the total, 1290 (93....

Lesser Spotted Eagle ( Aquila pomarina ) colour ringing programme and its first results in the period 2000-2008 in Slovakia In Slovakia during 2000-2008, 636 Lesser Spotted Eagles ( Aquila pomarina ) were marked with readable colour rings with double figure code. This is the highest number of Lesser Spotted Eagles marked in such a way in Europe. Fr...

In the period 1964-2007, data on 1472 ex. of prey was acquired from whole Slovakia. It was confirmed that the location of the breeding population on the foothills and mountains of the Carpathian Arc has a cardinal contribution to diet diversity. The breeding sites and hunting-grounds were found from 100 to 1 000 meters above sea level. The dominant...

Nesting of the Lesser Spotted Eagle ( Aquila pomarina ) at its hatching site Colour rings with alphanumeric codes have been used on the Lesser Spotted Eagles since 2000. On April 24, 2007 an eagle with a yellow ring I9 was photographed in the "Ondavská vrchovina" highlands near the village of Lieskovec in Humenné district. It was found out that the...