Breeding

Pair Formation

Along the upper Anadyr River, pairs were already formed and defending territories as of 5 May (18 Tomkovich, P. S. (2008). Birds of the upper Anadyr River (Chukotka Autonomous Area). Collection of Works of the Zoological Museum of Moscow State University, Number 49. Close ).

Nest-Building

No information available.

First Brood

Egg-laying occurs mostly from May into June (41 Harrap, S., J. del Hoyo, N. Collar, G. M. Kirwan, and D. A. Christie (2020). Eurasian Nuthatch (Sitta europaea), version 1.0. In Birds of the World (S. M. Billerman, B. K. Keeney, P. G. Rodewald, and T. S. Schulenberg, Editors). Cornell Lab of Ornithology, Ithaca, NY, USA. Close ).

Second/Later Broods

No information available.

Nests are made in natural cavities, or those excavated by woodpeckers, in trees up to 20 m above the ground (41 Harrap, S., J. del Hoyo, N. Collar, G. M. Kirwan, and D. A. Christie (2020). Eurasian Nuthatch (Sitta europaea), version 1.0. In Birds of the World (S. M. Billerman, B. K. Keeney, P. G. Rodewald, and T. S. Schulenberg, Editors). Cornell Lab of Ornithology, Ithaca, NY, USA. Close ).

Very limited data. Along the upper Anadyr River, a pair used a hole that in which a Great Spotted Woodpecker (Dendrocopos major) had successfully nested the previous summer, adjusting the entrance size by smearing the edges with clay (18 Tomkovich, P. S. (2008). Birds of the upper Anadyr River (Chukotka Autonomous Area). Collection of Works of the Zoological Museum of Moscow State University, Number 49. Close ).

Clutch typically consists of 5–9 eggs (41 Harrap, S., J. del Hoyo, N. Collar, G. M. Kirwan, and D. A. Christie (2020). Eurasian Nuthatch (Sitta europaea), version 1.0. In Birds of the World (S. M. Billerman, B. K. Keeney, P. G. Rodewald, and T. S. Schulenberg, Editors). Cornell Lab of Ornithology, Ithaca, NY, USA. Close ). No information available about size, shape, color, mass, etc.

The incubation period is ca. 15 days (41 Harrap, S., J. del Hoyo, N. Collar, G. M. Kirwan, and D. A. Christie (2020). Eurasian Nuthatch (Sitta europaea), version 1.0. In Birds of the World (S. M. Billerman, B. K. Keeney, P. G. Rodewald, and T. S. Schulenberg, Editors). Cornell Lab of Ornithology, Ithaca, NY, USA. Close ). Likely only the female incubates the eggs, as is true for the Eurasian Nuthatch, Sitta europaea, Red-breasted Nuthatch, Sitta canadensis, White-breasted Nuthatch, Sitta carolinensis and Pygmy Nuthatch, Sitta pygmaea (54 Bent, A. C. (1948). Life histories of North American nuthatches, wrens, thrashers, and their allies. United States National Museum Bulletin 195. Close , 55 Norris, R. A. (1958b). Comparative biosystematics and life history of the nuthatches Sitta pygmaea and Sitta pusilla. University of California Publications in Zoology 56:119-300. Close , 56 Ritchison, G. (1981a). Breeding biology of the White-breasted Nuthatch. Loon 53:184-187. Close ,7 Harrap, S., and D. Quinn (1996). Tits, Nuthatches & Treecreepers. Christopher Helm, London, UK. Close , 47 Ghalambor, C. K., and T. E. Martin. 1999. Red-breasted Nuthatch (Sitta canadensis). In The Birds of North America, No. 459 (A. Poole and F. Gill, eds.). The Birds of North America, Inc., Philadelphia, PA. Close ).

No information available.

Likely born altricial and nidicolous, as is true for Red-breasted Nuthatch, Sitta canadensis and Pygmy Nuthatch, Sitta pygmaea (55 Norris, R. A. (1958b). Comparative biosystematics and life history of the nuthatches Sitta pygmaea and Sitta pusilla. University of California Publications in Zoology 56:119-300. Close , 57 Baicich, P. J., and C. Harrison (1997). A Guide to the Nests, Eggs, and Nestlings of North American Birds. 2nd edition. Academic Press, San Diego, CA, USA. Close ).

Likely both parents feed the young, as is true for the Eurasian Nuthatch (Sitta europaea), Red-breasted Nuthatch, White-breasted Nuthatch, and Pygmy Nuthatch (54 Bent, A. C. (1948). Life histories of North American nuthatches, wrens, thrashers, and their allies. United States National Museum Bulletin 195. Close , 55 Norris, R. A. (1958b). Comparative biosystematics and life history of the nuthatches Sitta pygmaea and Sitta pusilla. University of California Publications in Zoology 56:119-300. Close , 56 Ritchison, G. (1981a). Breeding biology of the White-breasted Nuthatch. Loon 53:184-187. Close ,7 Harrap, S., and D. Quinn (1996). Tits, Nuthatches & Treecreepers. Christopher Helm, London, UK. Close , 47 Ghalambor, C. K., and T. E. Martin. 1999. Red-breasted Nuthatch (Sitta canadensis). In The Birds of North America, No. 459 (A. Poole and F. Gill, eds.). The Birds of North America, Inc., Philadelphia, PA. Close ).

No information available.

No information available.

The nestling period is ca. 18–22 days, and young are largely independent after a further 8–14 days (41 Harrap, S., J. del Hoyo, N. Collar, G. M. Kirwan, and D. A. Christie (2020). Eurasian Nuthatch (Sitta europaea), version 1.0. In Birds of the World (S. M. Billerman, B. K. Keeney, P. G. Rodewald, and T. S. Schulenberg, Editors). Cornell Lab of Ornithology, Ithaca, NY, USA. Close ). Shortly after fledging, juveniles have about the same mass as adults (18 Tomkovich, P. S. (2008). Birds of the upper Anadyr River (Chukotka Autonomous Area). Collection of Works of the Zoological Museum of Moscow State University, Number 49. Close ). Shortly after becoming independent, they have been noted to form flocks consisting largely of juveniles (18 Tomkovich, P. S. (2008). Birds of the upper Anadyr River (Chukotka Autonomous Area). Collection of Works of the Zoological Museum of Moscow State University, Number 49. Close ).

Behavior After Independence

No information available.