15-day nestling mass of great tits as a function of clutch size during

Nest characteristics and composition of the colonial nesting Azure-winged magpie Cyanopica cyanus in South Korea [PeerJ]

André DHONDT, Professor, Ph.D. Ghent State University

House sparrow - Wikipedia

Frontiers Parental behavior and newborn attachment in birds: life history traits and endocrine responses

Frontiers Timing and Intensity of Weather Events Shape Nestling Development Strategies in Three Alpine Breeding Songbirds

No evidence for associations between brood size, gut microbiome diversity and survival in great tit (Parus major) nestlings, Animal Microbiome

Nest microclimate during incubation affects posthatching development and parental care in wild birds

Clutch size, incubation & hatching

Urban metal pollution explains variation in reproductive outputs in great tits and blue tits - ScienceDirect