Ecological changes evoke many felt losses and types of grief. These affect sustainability efforts in profound ways. Scholarship on the topic is growing, but the relationship between general grief research and ecological grief has received surprisingly little attention. This interdisciplinary article applies theories of grief, loss, and bereavement to ecological grief. Special attention is given to research on “non-death loss” and other broad frameworks of grief. The dynamics related to both local and global ecological grief are discussed. The kinds of potential losses arising from ecological issues are clarified using the frameworks of tangible/intangible loss, ambiguous loss, nonfinite loss and shattered assumptions. Various possible types of ecological grief are illuminated by discussing the frameworks of chronic sorrow and anticipatory grief/mourning. Earlier scholarship on disenfranchised ecological grief is augmented by further distinctions of the various forms it may take. The difficulties in defining complicated or prolonged grief in an ecological context are discussed, and four types of “complicated ecological grief” are explored. On the basis of the findings, three special forms of ecological loss and grief are identified and discussed: transitional loss and grief, lifeworld loss and shattered dreams. The implications of the results for ecological grief scholarship, counselling and coping are briefly discussed. The results can be used by psychological and healthcare professionals and researchers but also by members of the public who wish to reflect on their eco-emotions. They also have implications for policy makers.