This article presents the results of a 2025 field study of nesting birds in the Mordovian Nature Reserve near the village of Pushta and along adjacent ecological trails. Bird counts were conducted visually using a route method and singing males were recorded using a special app. An annotated list of species found in various biotopes is provided, including dates and the number of individuals (singing males). The density of nesting pairs was calculated for common species, and patterns of stationary distribution were identified. In the mixed forest natural zone, bird density and distribution were relatively uniform. In marshy areas with black alder thickets, bird numbers drop sharply. The majority of species originate from the European broadleaf forest complex. Four of the recorded birds are rare and listed in the Red Data Book of the Republic of Mordovia. The data obtained from this study can be used for comparison with other areas of the reserve and for educational activities on ecological trails.
Mordovian Nature Reserve, mixed forest, route census method, biotope, nesting bird species
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